PIC18F14K50-I/SS Microchip Technology, PIC18F14K50-I/SS Datasheet
PIC18F14K50-I/SS
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PIC18F14K50-I/SS Summary of contents
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... USB Flash Microcontrollers 2010 Microchip Technology Inc. PIC18F/LF1XK50 with nanoWatt XLP Technology Preliminary Data Sheet DS41350D ...
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... PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance, TSHARC, UniWinDriver, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...
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... With software enable option • Extended Watchdog Timer (WDT) - Programmable period from 4ms to 131s • Single-supply 3V In-Circuit Serial Programming™ (ICSP™) via two pins 2010 Microchip Technology Inc. PIC18F/LF1XK50 Extreme Low-Power Management PIC18LF1XK50 with nanoWatt XLP: • Sleep mode • ...
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... Single-Word SRAM (bytes) Instructions (bytes) PIC18F13K50/ 8K 4096 512 PIC18LF13K50 PIC18F14K50/ 16K 8192 768 PIC18LF14K50 Note 1: One pin is input only. 2: Channel count includes internal Fixed Voltage Reference (FVR) and Programmable Voltage Reference (CV 3: Includes the dual port RAM used by the USB module which is shared with the data memory. ...
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... AN6 C12IN2- CV REF 7 RC3 AN7 C12IN3- 6 RC4 C12OUT 5 RC5 8 RC6 AN8 9 RC7 AN9 Note 1: Input only. 2010 Microchip Technology Inc. PIC18F/LF1XK50 SDI/SDA RX/DT SCL/SCK TX/CK P1D P1C P1B CCP1/P1A T0CKI SS T13CKI/T1OSCI SDO T1OSCO Preliminary IOCA0 D+ PGD IOCA1 D- PGC IOCA3 Y MCLR/V ...
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... Packaging Information.............................................................................................................................................................. 401 Appendix A: Revision History............................................................................................................................................................. 407 Appendix B: Device Differences......................................................................................................................................................... 407 Index .................................................................................................................................................................................................. 409 The Microchip Web Site ..................................................................................................................................................................... 419 Customer Change Notification Service .............................................................................................................................................. 419 Customer Support .............................................................................................................................................................................. 419 Reader Response .............................................................................................................................................................................. 420 Product Identification System............................................................................................................................................................. 421 DS41350D-page 6 Preliminary 2010 Microchip Technology Inc. ...
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... When contacting a sales office or the literature center, please specify which device, revision of silicon and data sheet (include literature number) you are using. Customer Notification System Register on our web site at www.microchip.com/cn to receive the most current information on all of our products. 2010 Microchip Technology Inc. PIC18F/LF1XK50 Preliminary DS41350D-page 7 ...
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... PIC18F/LF1XK50 NOTES: DS41350D-page 8 Preliminary 2010 Microchip Technology Inc. ...
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... DEVICE OVERVIEW This document contains device specific information for the following devices: • PIC18F13K50 • PIC18F14K50 • PIC18LF13K50 • PIC18LF14K50 This family offers the advantages of all PIC18 microcontrollers – namely, high performance at an economical price – with the addition of high-endurance, Flash program memory. On top of ...
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... The devices are differentiated from each other in the following ways: 1. Flash program memory: • 8 Kbytes for PIC18F13K50/PIC18LF13K50 • 16 Kbytes for PIC18F14K50/PIC18LF14K50 2. On-chip 3.2V LDO regulator for PIC18F13K50 and PIC18F14K50. All other features for devices in this family are identical. These are summarized in Table 1-1. ...
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... Interrupt Sources I/O Ports Timers Enhanced Capture/ Compare/PWM Modules Serial Communications 10-Bit Analog-to-Digital Module Resets (and Delays) Instruction Set Packages 2010 Microchip Technology Inc. PIC18F/LF1XK50 PIC18F13K50 PIC18LF13K50 PIC18F14K50 Yes No 8K 4096 512 DC – 48 MHz 30 Ports MSSP, Enhanced USART, USB 9 Input Channels ...
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... RA3 is only available when MCLR functionality is disabled. 2: OSC1/CLKIN and OSC2/CLKOUT are only available in select oscillator modes and when these pins are not being used as digital I/O. Refer to Section 2.0 “Oscillator Module” for additional information. 3: PIC18F13K50/PIC18F14K50 only. DS41350D-page 12 Data Bus<8> Data Latch 8 ...
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... RB6 SCK SCI RB7/TX/CK 10 RB7 TX CK Legend: TTL = TTL compatible input ST = Schmitt Trigger input O = Output XTAL= Crystal Oscillator 2010 Microchip Technology Inc. PIC18F/LF1XK50 Pin Buffer Type Type I TTL Digital input I/O XCVR USB differential plus line (input/output) I/O ST ICSP™ programming data pin ...
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... Ground reference for logic and I/O pins 1 P — Positive supply for logic and I/O pins P — Positive supply for USB transceiver CMOS = CMOS compatible input or output I = Input P = Power XCVR = USB Differential Transceiver Preliminary Description 2010 Microchip Technology Inc. ...
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... CPU Clock Divider • USB Operation - Low Speed - Full Speed • Two-Speed Start-up Mode • Fail-Safe Clock Monitoring 2010 Microchip Technology Inc. PIC18F/LF1XK50 2.2 System Clock Selection The SCS bits of the OSCCON register select between the following clock sources: • ...
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... MHz 110 4 MHz 101 2 MHz 100 1 MHz 011 500 kHz 010 250 kHz 001 31 kHz 1 000 0 INTSRC Fail-Safe Clock Watchdog Two-Speed Timer Start-up Preliminary IDLEN Sleep 00 Peripherals System 1x Clock CPU Sleep 01 FOSC<3:0> Clock SCS<1:0> Control 2010 Microchip Technology Inc. ...
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... This mode is best suited for resonators that require a high drive setting. Figure 2-2 and Figure 2-3 show typical circuits for quartz crystal and ceramic resonators, respectively. 2010 Microchip Technology Inc. PIC18F/LF1XK50 FIGURE 2-2: QUARTZ CRYSTAL ...
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... The Secondary External Oscillator is designed to drive an external 32.768 kHz crystal. This oscillator is enabled or disabled by the T1OSCEN bit of the T1CON register. See Section 11.0 “Timer1 Module” for more information. Internal Clock Preliminary of the DD 0 – 250 kHz 4 – 48 MHz 2010 Microchip Technology Inc. ...
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... MHZ • 1 MHZ (Default after Reset) • 500 kHz • 250 kHz • 31 kHz 2010 Microchip Technology Inc. PIC18F/LF1XK50 The HFIOFS bit of the OSCCON register indicates whether the HFINTOSC is stable. Note 1: Selecting 31 kHz from the HFINTOSC oscillator requires IRCF<2:0> = 000 and the INTSRC bit of the OSCTUNE register to be set ...
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... Source selected by the INTSRC bit of the OSCTUNE register, see text. 3: Default output frequency of HFINTOSC on Reset. DS41350D-page 20 R/W-1 R-q R-0 (1) IRCF0 OSTS HFIOFS U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared (1) Preliminary R/W-0 R/W-0 SCS1 SCS0 bit depends on condition x = Bit is unknown 2010 Microchip Technology Inc. ...
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... HFIOFL: HFINTOSC Frequency Locked bit 1 = HFINTOSC is in lock 0 = HFINTOSC has not yet locked bit 0 LFIOFS: LFINTOSC Frequency Stable bit 1 = LFINTOSC is stable 0 = LFINTOSC is not stable 2010 Microchip Technology Inc. PIC18F/LF1XK50 U-0 U-0 R/W-1 — — PRI_SD U = Unimplemented bit, read as ‘0’ ...
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... For more details about the function of the SPLLEN bit see Section 2.9 “4x Phase Lock Loop Frequency Multiplier” R/W-0 R/W-0 R/W-0 TUN4 TUN3 TUN2 U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared Preliminary R/W-0 R/W-0 TUN1 TUN0 bit Bit is unknown 2010 Microchip Technology Inc. ...
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... New Clk Ready IRCF <2:0> Select Old System Clock Note 1: Start-up time includes T OST 2010 Microchip Technology Inc. PIC18F/LF1XK50 2.8 Clock Switching The device contains circuitry to prevent clock “glitches” due to a change of the system clock source. To accomplish this, a short pause in the system clock occurs during the clock switch ...
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... USB module. To generate the 48 MHz clock, only 2 Oscillator modes are allowed: • EC High-power mode • HS mode Table 2-5 shows the recommended Clock mode for full- speed operation. Preliminary Oscillator Delay Oscillator Warm-up Delay (T ) WARM 1024 clock cycles 8 clock cycles 2010 Microchip Technology Inc. ...
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... EC High/HS 12 MHz Note: The system clock frequency in the above table only applies if the OSCCON register bits SCS<1:0> = 00. By changing these bits, the system clock can operate down to 31 kHz. 2010 Microchip Technology Inc. PIC18F/LF1XK50 4x PLL USBDIV CPUDIV<1:0> Enabled Yes 1 No ...
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... The internal clock source chosen by the FSCM is determined by the IRCF<2:0> bits of the OSCCON register. This allows the internal oscillator to be configured before a failure occurs. Preliminary 2010 Microchip Technology Inc. Clock Monitor Latch ...
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... Shaded cells are not used by oscillators. Note 1: Other (non Power-up) Resets include MCLR Reset and Watchdog Timer Reset during normal operation. 2010 Microchip Technology Inc. PIC18F/LF1XK50 any type of Reset. The OST is not used with the Clock modes so that the FSCM will be active as soon as the Reset or wake-up has completed ...
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... PIC18F/LF1XK50 NOTES: DS41350D-page 28 Preliminary 2010 Microchip Technology Inc. ...
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... NOP instruction). This family of devices contain the following: • PIC18F13K50: 8 Kbytes of Flash Memory 4,096 single-word instructions • PIC18F14K50: 16 Kbytes of Flash Memory 8,192 single-word instructions PIC18 devices have two interrupt vectors and one Reset vector. The Reset vector address is at 0000h and the interrupt vector addresses are at 0008h and 0018h ...
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... The user must disable the global interrupt enable bits while accessing the stack to prevent inadvertent stack corruption. Return Address Stack <20:0> 11111 11110 11101 TOSL 34h 00011 001A34h 00010 Top-of-Stack 000D58h 00001 00000 Preliminary Stack Pointer STKPTR<4:0> 00010 2010 Microchip Technology Inc. ...
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... SP<4:0>: Stack Pointer Location bits Note 1: Bit 7 and bit 6 are cleared by user software POR. 2010 Microchip Technology Inc. PIC18F/LF1XK50 When the stack has been popped enough times to unload the stack, the next pop will return a value of zero to the PC and sets the STKUNF bit, while the Stack Pointer remains at zero ...
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... Table Latch (TABLAT) register contains the data that is read from or written to program memory. Data is transferred to or from program memory one byte at a time. Table read and table write operations are discussed further in Section 4.1 “Table Reads and Table Writes”. Preliminary 2010 Microchip Technology Inc. nn ...
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... Instruction @ address SUB_1 All instructions are single cycle, except for any program branches. These take two cycles since the fetch instruction is “flushed” from the pipeline while the new instruction is being fetched and then executed. 2010 Microchip Technology Inc. PIC18F/LF1XK50 3.2.2 INSTRUCTION FLOW/PIPELINING An “ ...
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... RAM location 0? REG1, REG2 ; Yes, execute this word ; 2nd word of instruction REG3 ; continue code Preliminary address embedded into the 0006h is encoded in the program Word Address 000000h 000002h 000004h 000006h 000008h 00000Ah 00000Ch 00000Eh 000010h 000012h 000014h 2010 Microchip Technology Inc. ...
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... Additional information on USB RAM and buffer operation is provided in Section 22.0 “Universal Serial Bus (USB)” 2010 Microchip Technology Inc. PIC18F/LF1XK50 3.3.2 BANK SELECT REGISTER (BSR) Large areas of data memory require an efficient addressing scheme to make rapid access to any address possible ...
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... Bank 0). The second 160 bytes are Special Function Registers (from Bank 15). When ‘a’ The BSR specifies the Bank used by the instruction. Access Bank 00h Access RAM Low 5Fh 60h Access RAM High (SFRs) FFh 2010 Microchip Technology Inc. ...
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... FIGURE 3-6: DATA MEMORY MAP FOR PIC18F14K50/PIC18LF14K50 DEVICES BSR<3:0> 00h = 0000 Bank 0 FFh 00h = 0001 Bank 1 FFh 00h = 0010 Bank 2 FFh 00h = 0011 Bank 3 FFh 00h = 0100 Bank 4 FFh 00h = 0101 Bank 5 FFh 00h = 0110 Bank 6 FFh 00h = 0111 Bank 7 FFh ...
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... The MOVFF instruction embeds the entire 12-bit address in the instruction. DS41350D-page 38 Data Memory 000h 7 00h Bank 0 1 FFh 100h 00h Bank 1 FFh 200h 00h Bank 2 FFh 300h 00h Bank 3 through Bank 13 FFh E00h 00h Bank 14 FFh F00h 00h Bank 15 FFFh FFh Preliminary (2) From Opcode 2010 Microchip Technology Inc. ...
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... The mapping of the Access Bank is slightly different when the extended instruction set is enabled (XINST Configuration bit = 1). This is discussed in more detail in Section 3.5.3 “Mapping the Access Bank in Indexed Literal Offset Mode”. 2010 Microchip Technology Inc. PIC18F/LF1XK50 3.3.4 GENERAL PURPOSE REGISTER FILE PIC18 devices may have banked memory in the GPR area ...
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... UEP4 ANSEL F56h UEP3 (2) — F55h UEP2 (2) — F54h UEP1 (2) — F53h UEP0 IOCB IOCA WPUB WPUA SLRCON (2) — (2) — (2) — (2) — (2) — (2) — (2) — (2) — SRCON1 SRCON0 (2) — (2) — (2) — UCON USTAT UIR UCFG UIE 2010 Microchip Technology Inc. ...
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... The RA3 bit is only available when Master Clear Reset is disabled (MCLRE Configuration bit = 0). Otherwise, RA3 reads as ‘0’. This bit is read-only. 3: Bits RA0 and RA1 are available only when USB is disabled. 2010 Microchip Technology Inc. PIC18F/LF1XK50 Bit 4 Bit 3 Bit 2 Top-of-Stack Upper Byte (TOS<20:16>) ...
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... STRA ---0 0001 289, 134 ABDEN 0100 0-00 289, 194 PDC0 0000 0000 289, 133 PSSBD0 0000 0000 289, 129 xxxx xxxx 289, 115 xxxx xxxx 289, 115 TMR3ON 0-00 0000 289, 113 2010 Microchip Technology Inc. ...
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... The RA3 bit is only available when Master Clear Reset is disabled (MCLRE Configuration bit = 0). Otherwise, RA3 reads as ‘0’. This bit is read-only. 3: Bits RA0 and RA1 are available only when USB is disabled. 2010 Microchip Technology Inc. PIC18F/LF1XK50 Bit 4 Bit 3 Bit 2 Bit 1 ...
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... PIDEE ---0 0000 291, 259 EPSTALL ---0 0000 291, 259 EPSTALL ---0 0000 291, 259 EPSTALL ---0 0000 291, 259 EPSTALL ---0 0000 291, 259 EPSTALL ---0 0000 291, 259 EPSTALL ---0 0000 291, 259 EPSTALL ---0 0000 287, 259 EPSTALL 2010 Microchip Technology Inc. ...
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... For Borrow, the polarity is reversed. A subtraction is executed by adding the two’s complement of the second operand. For rotate (RRF, RLF) instructions, this bit is loaded with either the high-order or low-order bit of the source register. 2010 Microchip Technology Inc. PIC18F/LF1XK50 It is recommended that only BCF, BSF, SWAPF, MOVFF ...
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... Example 3-5. EXAMPLE 3-5: HOW TO CLEAR RAM (BANK 1) USING INDIRECT ADDRESSING LFSR FSR0, 100h ; NEXT CLRF POSTINC0 BTFSS FSR0H, 1 BRA NEXT CONTINUE Preliminary 2010 Microchip Technology Inc. ; Clear INDF ; register then ; inc pointer ; All done with ; Bank1? ; NO, clear next ; YES, continue ...
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... In this case, the FSR1 pair contains ECCh. This means the contents of location ECCh will be added to that of the W register and stored back in ECCh. 2010 Microchip Technology Inc. PIC18F/LF1XK50 3.4.3.2 FSR Registers and POSTINC, POSTDEC, PREINC and PLUSW In addition to the INDF operand, each FSR register pair also has four additional indirect operands. Like INDF, these are “ ...
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... Figure 3-9. Those who desire to use byte-oriented or bit-oriented instructions in the Indexed Literal Offset mode should note the changes to assembler syntax for this mode. This is described in more detail in Section 25.2.1 “Extended Instruction Syntax”. Preliminary 2010 Microchip Technology Inc. ...
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... The bank is designated by the Bank Select Register (BSR). The address can be in any implemented bank in the data memory space. 2010 Microchip Technology Inc. PIC18F/LF1XK50 000h 060h Bank 0 100h Bank 1 through ...
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... PIC18 instruction set. These instructions are executed as described in Section 25.2 “Extended Instruction Set”. Bank 0 Bank 1 Window Bank 1 Bank 2 through Bank 14 Bank 15 SFRs Data Memory Preliminary 00h Bank 1 “Window” 5Fh 60h SFRs FFh Access Bank 2010 Microchip Technology Inc. ...
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... WRITE/ERASE BLOCK SIZES Write Block Device Size (bytes) PIC18F13K50 8 PIC18F14K50 16 Writing or erasing program memory will cease instruction fetches until the operation is complete. The program memory cannot be accessed during the write or erase, therefore, code cannot execute. An internal programming timer terminates program memory writes and erases ...
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... Then WR bit is cleared by hardware at the completion of the write operation. Note: The EEIF interrupt flag bit of the PIR2 register is set when the write is complete. The EEIF flag stays set until cleared by firmware. Preliminary Table Latch (8-bit) TABLAT 2010 Microchip Technology Inc. ...
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... RD bit cannot be set when EEPGD = 1 or CFGS = 1 Does not initiate an EEPROM read Note 1: When a WRERR occurs, the EEPGD and CFGS bits are not cleared. This allows tracing of the error condition. 2010 Microchip Technology Inc. PIC18F/LF1XK50 R/W-0 R/W-x R/W-0 ...
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... Figure 4-3 describes the relevant boundaries of TBLPTR based on Flash program memory operations. Operation on Table Pointer TBLPTR is not modified TBLPTR is incremented after the read/write TBLPTR is decremented after the read/write TBLPTR is incremented before the read/write Preliminary the Table Pointer register 2010 Microchip Technology Inc. ...
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... TABLAT. In addition, TBLPTR can be modified automatically for the next table read operation. FIGURE 4-4: READS FROM FLASH PROGRAM MEMORY (Even Byte Address) Instruction Register FETCH (IR) 2010 Microchip Technology Inc. PIC18F/LF1XK50 8 7 TBLPTRH (1) TABLE READ – TBLPTR<21:0> The internal program memory is typically organized by words ...
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... TBLPTRL READ_WORD TBLRD*+ MOVF TABLAT, W MOVWF WORD_EVEN TBLRD*+ MOVFW TABLAT, W MOVF WORD_ODD DS41350D-page 56 ; Load TBLPTR with the base ; address of the word ; read into TABLAT and increment ; get data ; read into TABLAT and increment ; get data Preliminary 2010 Microchip Technology Inc. ...
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... EECON2 MOVLW 0AAh MOVWF EECON2 BSF EECON1, WR BSF INTCON, GIE 2010 Microchip Technology Inc. PIC18F/LF1XK50 4.4.1 FLASH PROGRAM MEMORY ERASE SEQUENCE The sequence of events for erasing a block of internal program memory is: 1. Load Table Pointer register with address of block being erased. ...
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... An example of the required code is given in Example 4-3. Note: Before setting the WR bit, the Table Pointer address needs to be within the intended address range of the bytes in the holding registers. Preliminary 8 (1) TBLPTR = xxxxYY Holding Register 2010 Microchip Technology Inc. ...
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... D’64’/BlockSize MOVWF COUNTER2 WRITE_BYTE_TO_HREGS MOVF POSTINC0, W MOVWF TABLAT TBLWT+* 2010 Microchip Technology Inc. PIC18F/LF1XK50 ; number of bytes in erase block ; point to buffer ; Load TBLPTR with the base ; address of the memory block ; read into TABLAT, and inc ; get data ; store data ...
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... EEIP BCLIP USBIP C2IF EEIF BCLIF USBIF C2IE EEIE BCLIE USBIE Preliminary Reset Bit 1 Bit 0 Values on page 287 287 287 287 INT0IF RABIF 287 289 WR RD 289 TMR3IP — 290 TMR3IF — 290 TMR3IE — 290 2010 Microchip Technology Inc. ...
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... EECON1 and EECON2. These are the same registers which control access to the program memory and are used in a similar manner for the data EEPROM. 2010 Microchip Technology Inc. PIC18F/LF1XK50 The EECON1 register (Register 5-1) is the control register for data and program memory access. Control bit EEPGD determines if the access will be to program or data EEPROM memory ...
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... When a WRERR occurs, the EEPGD and CFGS bits are not cleared. This allows tracing of the error condition. DS41350D-page 62 R/W-0 R/W-x R/W-0 FREE WRERR WREN U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared (1) Preliminary R/S-0 R/S bit Bit is unknown 2010 Microchip Technology Inc. ...
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... BSF EECON1, WR BSF INTCON, GIE BCF EECON1, WREN 2010 Microchip Technology Inc. PIC18F/LF1XK50 Additionally, the WREN bit in EECON1 must be set to enable writes. This mechanism prevents accidental writes to data EEPROM due to unexpected code execution (i.e., runaway programs). The WREN bit should be kept clear at all times, except when updating the EEPROM ...
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... WREN C2IP EEIP BCLIP USBIP C2IF EEIF BCLIF USBIF C2IE EEIE BCLIE USBIE Preliminary Reset Bit 1 Bit 0 Values on page INT0IF RABIF 287 289 289 289 WR RD 289 TMR3IP — 290 TMR3IF — 290 TMR3IE — 290 2010 Microchip Technology Inc. ...
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... Without hardware multiply unsigned Hardware multiply Without hardware multiply signed Hardware multiply Without hardware multiply unsigned Hardware multiply Without hardware multiply signed Hardware multiply 2010 Microchip Technology Inc. PIC18F/LF1XK50 EXAMPLE 6- UNSIGNED MULTIPLY ROUTINE MOVF ARG1 MULWF ARG2 ; ARG1 * ARG2 -> ; PRODH:PRODL ...
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... PRODL RES1 Add cross PRODH products ; WREG ; ; ARG1H ARG2L ; ARG1H * ARG2L -> ; PRODH:PRODL PRODL RES1 Add cross PRODH products ; WREG ; ; ARG2H ARG2H:ARG2L neg? SIGN_ARG1 ; no, check ARG1 ARG1L RES2 ; ARG1H ARG1H ARG1H:ARG1L neg? CONT_CODE ; no, done ARG2L RES2 ; ARG2H 2010 Microchip Technology Inc. ...
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... All interrupts branch to address 0008h in Compatibility mode. 2010 Microchip Technology Inc. PIC18F/LF1XK50 7.2 Interrupt Priority The interrupt priority feature is enabled by setting the IPEN bit of the RCON register ...
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... INT2IE INT2IP IPEN IPEN GIEL/PEIE IPEN TMR0IF TMR0IE TMR0IP (1) RABIF RABIE RABIP INT1IF INT1IE INT1IP INT2IF INT2IE INT2IP Preliminary 2010 Microchip Technology Inc. Wake- Idle or Sleep modes Interrupt to CPU Vector to Location 0008h GIEH/GIE Interrupt to CPU Vector to Location 0018h GIEH/GIE GIEL/PEIE ...
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... A mismatch condition will continue to set the RABIF bit. Reading PORTA and PORTB will end the mismatch condition and allow the bit to be cleared and RB port change interrupts also require the individual pin IOCA and IOCB enable. 2010 Microchip Technology Inc. PIC18F/LF1XK50 Note: Interrupt flag bits are set when an interrupt ...
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... This feature allows for software polling. DS41350D-page 70 R/W-1 U-0 R/W-1 INTEDG2 — TMR0IP U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared Preliminary U-0 R/W-1 — RABIP bit Bit is unknown 2010 Microchip Technology Inc. ...
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... User software should ensure the appropriate interrupt flag bits are clear prior to enabling an interrupt. This feature allows for software polling. 2010 Microchip Technology Inc. PIC18F/LF1XK50 R/W-0 R/W-0 U-0 INT2IE INT1IE — ...
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... R-0 R/W-0 R/W-0 TXIF SSPIF CCP1IF U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared Preliminary 2010 Microchip Technology Inc. R/W-0 R/W-0 TMR2IF TMR1IF bit Bit is unknown ...
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... USB has requested an interrupt (must be cleared in software USB interrupt request bit 1 TMR3IF: TMR3 Overflow Interrupt Flag bit 1 = TMR3 register overflowed (must be cleared by software TMR3 register did not overflow bit 0 Unimplemented: Read as ‘0’ 2010 Microchip Technology Inc. PIC18F/LF1XK50 R/W-0 R/W-0 R/W-0 EEIF BCLIF USBIF U = Unimplemented bit, read as ‘ ...
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... TMR1IE: TMR1 Overflow Interrupt Enable bit 1 = Enables the TMR1 overflow interrupt 0 = Disables the TMR1 overflow interrupt DS41350D-page 74 R/W-0 R/W-0 R/W-0 TXIE SSPIE CCP1IE U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared Preliminary R/W-0 R/W-0 TMR2IE TMR1IE bit Bit is unknown 2010 Microchip Technology Inc. ...
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... USBIE: USB Interrupt Enable bit 1 = Enabled 0 = Disabled bit 1 TMR3IE: TMR3 Overflow Interrupt Enable bit 1 = Enabled 0 = Disabled bit 0 Unimplemented: Read as ‘0’ 2010 Microchip Technology Inc. PIC18F/LF1XK50 R/W-0 R/W-0 R/W-0 EEIE BCLIE USBIE U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared ...
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... Low priority bit 0 TMR1IP: TMR1 Overflow Interrupt Priority bit 1 = High priority 0 = Low priority DS41350D-page 76 R/W-1 R/W-1 R/W-1 TXIP SSPIP CCP1IP U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared Preliminary R/W-1 R/W-1 TMR2IP TMR1IP bit Bit is unknown 2010 Microchip Technology Inc. ...
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... USBIP: USB Interrupt Priority bit 1 = High priority 0 = Low priority bit 1 TMR3IP: TMR3 Overflow Interrupt Priority bit 1 = High priority 0 = Low priority bit 0 Unimplemented: Read as ‘0’ 2010 Microchip Technology Inc. PIC18F/LF1XK50 R/W-1 R/W-1 R/W-1 EEIP BCLIP USBIP U = Unimplemented bit, read as ‘0’ ...
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... The actual Reset value of POR is determined by the type of device Reset. See the notes following this register and Section 23.6 “Reset State of Registers” for additional information. 3: See Table 23-3. DS41350D-page 78 R/W-1 R-1 R Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared (1) (2) (3) Preliminary R/W-0 R/W-0 (2) POR BOR bit Bit is unknown 2010 Microchip Technology Inc. ...
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... USER ISR CODE ; MOVFF BSR_TEMP, BSR MOVF W_TEMP, W MOVFF STATUS_TEMP, STATUS 2010 Microchip Technology Inc. PIC18F/LF1XK50 7.10 TMR0 Interrupt In 8-bit mode (which is the default), an overflow in the TMR0 register (FFh 00h) will set flag bit, TMR0IF the 16-bit mode, an overflow in the TMR0H:TMR0L regis- ter pair (FFFFh ...
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... PIC18F/LF1XK50 NOTES: DS41350D-page 80 Preliminary 2010 Microchip Technology Inc. ...
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... Reset while a constant current source charges the external capacitor. After the cap is fully charged, the device is released from Reset. For more information, refer to Section 27.0 “Electrical Specifications”. 2010 Microchip Technology Inc. PIC18F/LF1XK50 from the ). ...
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... PIC18F/LF1XK50 NOTES: DS41350D-page 82 Preliminary 2010 Microchip Technology Inc. ...
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... Port Note 1: I/O pins have diode protection to V 2010 Microchip Technology Inc. PIC18F/LF1XK50 9.1 PORTA, TRISA and LATA Registers PORTA is 5 bits wide. PORTA<5:4> bits are bidirectional ports and PORTA<3,1:0> bits are input- only ports. The corresponding data direction register is TRISA ...
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... EXAMPLE 9-1: INITIALIZING PORTA CLRF PORTA ; Initialize PORTA by ; clearing output ; data latches CLRF LATA ; Alternate method ; to clear output ; data latches MOVLW 030h ; Value used to ; initialize data ; direction MOVWF TRISA ; Set RA<5:4> as output Preliminary 2010 Microchip Technology Inc. ...
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... TRISA<5:4>: PORTA Tri-State Control bit 1 = PORTA pin configured as an input (tri-stated PORTA pin configured as an output bit 3-0 Unimplemented: Read as ‘0’ Note 1: TRISA<5:4> always reads ‘1’ in XT, HS and LP Oscillator modes. 2010 Microchip Technology Inc. PIC18F/LF1XK50 R/W-x R-x U-0 RA4 RA3 — ...
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... U-0 U-0 LATA4 — — Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared Preliminary U-0 U-0 — — bit Bit is unknown R/W-0 R/W-0 IOCA1 IOCA0 bit Bit is unknown U-0 U-0 — — bit Bit is unknown 2010 Microchip Technology Inc. ...
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... Note 1: RA0 and RA1 do not have corresponding TRISA bits. In Port mode, these pins are input only. USB data direction is determined by the USB configuration. 2: RA3 does not have a corresponding TRISA bit. This pin is always an input regardless of mode. 2010 Microchip Technology Inc. PIC18F/LF1XK50 I/O ...
Page 88
... Reset Bit 1 Bit 0 Values on page (3) (3) RA1 RA0 290 — — 290 — — 290 — — 290 SLRB SLRA 290 (3) (3) 290 IOCA1 IOCA0 — — 290 — 290 INT0IF RABIF 287 — RABIP 287 2010 Microchip Technology Inc. ...
Page 89
... A mismatch condition will continue to set the RABIF flag bit. Reading or writing PORTB will end the mismatch condition and allow the RABIF bit to be cleared. The latch 2010 Microchip Technology Inc. PIC18F/LF1XK50 holding the last read value is not affected by a MCLR nor Brown-out Reset ...
Page 90
... U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared R/W-1 U-0 U-0 TRISB4 — — Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared Preliminary U-0 U-0 — — bit Bit is unknown U-0 U-0 — — bit Bit is unknown 2010 Microchip Technology Inc. ...
Page 91
... R = Readable bit W = Writable bit -n = Value at POR ‘1’ = Bit is set bit 7-4 LATB<7:4>: RB<7:4> Port I/O Output Latch Register bits bit 3-0 Unimplemented: Read as ‘0’ 2010 Microchip Technology Inc. PIC18F/LF1XK50 R/W-1 U-0 U-0 WPUB4 — — Unimplemented bit, read as ‘0’ ...
Page 92
... Asynchronous serial transmit data output (USART module); takes priority over port data. User must configure as output. O DIG Synchronous serial clock output (USART module); takes priority over port data Synchronous serial clock input (USART module). Preliminary Description 2010 Microchip Technology Inc. ...
Page 93
... ANSELH — — TXSTA CSRC TX9 RCSTA SPEN RX9 SSPCON1 WCOL SSPOV Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by PORTB. 2010 Microchip Technology Inc. PIC18F/LF1XK50 Bit 5 Bit 4 Bit 3 Bit 2 RB5 RB4 — — LATB5 LATB4 — ...
Page 94
... U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared R/W-1 R/W-1 R/W-1 TRISC4 TRISC3 TRISC2 U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared Preliminary R/W-x R/W-x RC1 RC0 bit Bit is unknown R/W-1 R/W-1 TRISC1 TRISC0 bit Bit is unknown 2010 Microchip Technology Inc. ...
Page 95
... LATC5 bit 7 Legend Readable bit W = Writable bit -n = Value at POR ‘1’ = Bit is set bit 7-0 LATC<7:0>: RB<7:0> Port I/O Output Latch Register bits 2010 Microchip Technology Inc. PIC18F/LF1XK50 R/W-x R/W-x R/W-x LATC4 LATC3 LATC2 U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared ...
Page 96
... LATC<4> data output PORTC<4> data input. O DIG Comparator 1 and 2 output; takes priority over port data. O DIG ECCP1 Enhanced PWM output, channel B. May be configured for tri-state during Enhanced PWM shutdown events. Takes priority over port data. Preliminary Description 2010 Microchip Technology Inc. ...
Page 97
... SLRCON — — REFCON1 D1EN D1LPS INTCON GIE/GIEH PEIE/GIEL INTCON2 RABPU INTEDG0 INTCON3 INT2IP INT1IP 2010 Microchip Technology Inc. PIC18F/LF1XK50 I/O I/O Type O DIG LATC<5> data output PORTC<5> data input. O DIG ECCP1 compare or PWM output; takes priority over port data. ...
Page 98
... ANSx bit set will still operate as a digital output but the Input mode will be analog. R/W-1 R/W-1 U-0 ANS4 ANS3 — Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared Preliminary U-0 U-0 — — bit Bit is unknown 2010 Microchip Technology Inc. ...
Page 99
... ANS9: RC7 Analog Select Control bit 1 = Digital input buffer of RC7 is disabled 0 = Digital input buffer of RC7 is enabled bit 0 ANS8: RC6 Analog Select Control bit 1 = Digital input buffer of RC6 is disabled 0 = Digital input buffer of RC6 is enabled 2010 Microchip Technology Inc. PIC18F/LF1XK50 U-0 R/W-1 R/W-1 — ANS11 ANS10 U = Unimplemented bit, read as ‘ ...
Page 100
... Note 1: The slew rate of RA4 defaults to standard rate when the pin is used as CLKOUT. DS41350D-page 100 U-0 U-0 R/W-1 — — SLRC U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared (1) Preliminary 2010 Microchip Technology Inc. R/W-1 R/W-1 SLRB SLRA bit Bit is unknown ...
Page 101
... Microchip Technology Inc. PIC18F/LF1XK50 The T0CON register (Register 10-1) controls all aspects of the module’s operation, including the prescale selection both readable and writable. ...
Page 102
... Timer0 is updated with the contents of TMR0H when a write occurs to TMR0L. This allows all 16 bits of Timer0 to be updated at once. ). OSC 0 Sync with Internal Clocks Programmable 1 Prescaler (2 T Delay Preliminary Set TMR0IF TMR0L on Overflow 8 8 Internal Data Bus 2010 Microchip Technology Inc. ...
Page 103
... TRISC6 Legend: Shaded cells are not used by Timer0. Note 1: PORTA<7:6> and their direction bits are individually configured as port pins based on various primary oscillator modes. When disabled, these bits read as ‘0’. 2010 Microchip Technology Inc. PIC18F/LF1XK50 0 Sync with Internal TMR0L ...
Page 104
... PIC18F/LF1XK50 NOTES: DS41350D-page 104 Preliminary 2010 Microchip Technology Inc. ...
Page 105
... OSC bit 0 TMR1ON: Timer1 On bit 1 = Enables Timer1 0 = Stops Timer1 2010 Microchip Technology Inc. PIC18F/LF1XK50 A simplified block diagram of the Timer1 module is shown in Figure 11-1. A block diagram of the module’s operation in Read/Write mode is shown in Figure 11-2. The module incorporates its own low-power oscillator to provide an additional clocking option ...
Page 106
... When the bit is set, Timer1 OSC 1 Synchronize 0 Detect Sleep Input Timer1 On/Off Set TMR1 TMR1IF High Byte on Overflow 1 Synchronize 0 Detect Sleep Input Timer1 On/Off Set TMR1 TMR1IF High Byte on Overflow 8 Read TMR1L Write TMR1L 8 TMR1H 8 8 Internal Data Bus 2010 Microchip Technology Inc. ...
Page 107
... XTAL 32.768 kHz T1OSO Note: See the Notes with Table 11-1 for additional information about capacitor selection. 2010 Microchip Technology Inc. PIC18F/LF1XK50 TABLE 11-1: Osc Type LP Note 1: Microchip suggests these values only as a starting point in validating the oscillator circuit. 2: Higher capacitance increases the stability of the oscillator but also increases the start-up time ...
Page 108
... In the event that a write to Timer1 coincides with a special Event Trigger, the write operation will take precedence. Note: The Special Event Triggers from the CCP2 module will not set the TMR1IF interrupt flag bit of the PIR1 register. Preliminary 2010 Microchip Technology Inc. ...
Page 109
... CPFSGT hours RETURN CLRF hours RETURN 2010 Microchip Technology Inc. PIC18F/LF1XK50 Since the register pair is 16 bits wide, a 32.768 kHz clock source will take 2 seconds to count up to over- flow. To force the overflow at the required one-second intervals necessary to preload it; the simplest method is to set the MSb of TMR1H with a BSF instruc- tion ...
Page 110
... SSPEN CKP SSPM3 SSPM2 Preliminary Reset Bit 1 Bit 0 Values on page INT0IF RABIF 287 TMR2IF TMR1IF 290 TMR2IE TMR1IE 290 TMR2IP TMR1IP 290 288 288 TMR1CS TMR1ON 288 TRISC1 TRISC0 290 ANS9 ANS8 290 SSPM1 SSPM0 288 2010 Microchip Technology Inc. ...
Page 111
... TMR2ON: Timer2 On bit 1 = Timer2 Timer2 is off bit 1-0 T2CKPS<1:0>: Timer2 Clock Prescale Select bits 00 = Prescaler Prescaler Prescaler is 16 2010 Microchip Technology Inc. PIC18F/LF1XK50 12.1 Timer2 Operation In normal operation, TMR2 is incremented from 00h on each clock (F /4). A 4-bit counter/prescaler on the OSC clock input gives direct input, divide-by-4 and divide-by-16 prescale options ...
Page 112
... SSPIF CCP1IF TXIE SSPIE CCP1IE TXIP SSPIP CCP1IP Preliminary Set TMR2IF TMR2 Output (to PWM or MSSP) PR2 8 Reset Bit 1 Bit 0 Values on page INT0IF RABIF 287 TMR2IF TMR1IF 290 TMR2IE TMR1IE 290 TMR2IP TMR1IP 290 288 288 288 2010 Microchip Technology Inc. ...
Page 113
... OSC bit 0 TMR3ON: Timer3 On bit 1 = Enables Timer3 0 = Stops Timer3 2010 Microchip Technology Inc. PIC18F/LF1XK50 A simplified block diagram of the Timer3 module is shown in Figure 13-1. A block diagram of the module’s operation in Read/Write mode is shown in Figure 13-2. The Timer3 module is controlled through the T3CON register (Register 13-1) ...
Page 114
... TRISC<1:0> are ignored and the pins are read as ‘0’. Timer1 Clock Input 1 Prescaler F /4 OSC Internal 0 Clock 2 TMR3CS Clear TMR3 TMR3L Preliminary /4). When the bit is set, Timer3 OSC 1 Synchronize 0 Detect Sleep Input Timer3 On/Off Set TMR3 TMR3IF High Byte on Overflow 2010 Microchip Technology Inc. ...
Page 115
... The high byte of Timer3 is not directly readable or writable in this mode. All reads and writes must take place through the Timer3 High Byte Buffer register. Writes to TMR3H do not clear the Timer3 prescaler. The prescaler is only cleared on writes to TMR3L. 2010 Microchip Technology Inc. PIC18F/LF1XK50 Timer1 Clock Input 1 Prescaler ...
Page 116
... ANS11 ANS10 Preliminary Reset Bit 1 Bit 0 Values on page INT0IF RABIF 287 TMR3IF CCP2IF 290 TMR3IE CCP2IE 290 TMR3IP CCP2IP 290 289 289 TMR1CS TMR1ON 288 TMR3CS TMR3ON 289 TRISC1 TRISC0 290 ANS9 ANS8 290 2010 Microchip Technology Inc. ...
Page 117
... PWM mode; P1A, P1C active-high; P1B, P1D active-low 1110 = PWM mode; P1A, P1C active-low; P1B, P1D active-high 1111 = PWM mode; P1A, P1C active-low; P1B, P1D active-low 2010 Microchip Technology Inc. PIC18F/LF1XK50 CCP1 is implemented as a standard CCP module with enhanced PWM capabilities. These include: • ...
Page 118
... The assignment of a particular timer to a module is determined by the Timer-to-CCP enable bits in the T3CON register (Register 13-1). The interactions between the two modules are Figure 14-1. In Asynchronous Counter mode, the capture operation will not work reliably. DS41350D-page 118 summarized in Preliminary 2010 Microchip Technology Inc. ...
Page 119
... FIGURE 14-1: CAPTURE MODE OPERATION BLOCK DIAGRAM CCP1 pin Prescaler CCP1CON<3:0> Q1:Q4 2010 Microchip Technology Inc. PIC18F/LF1XK50 to be used with each CCP module is selected in the T3CON register (see Section 14.1.1 “CCP Module and Timer Resources”). 14.2.3 SOFTWARE INTERRUPT When the Capture mode is changed, a false capture interrupt may be generated ...
Page 120
... The Special Event Trigger can also start an A/D con- version. In order to do this, the A/D converter must already be enabled. Special Event Trigger (Timer1/Timer3 Reset, A/D Trigger) Set CCP1IF Compare Output Match Logic 4 CCP1CON<3:0> Preliminary Special Event Trigger mode CCP1 pin TRIS Output Enable 2010 Microchip Technology Inc. ...
Page 121
... Full-Bridge, Reverse 11 Note 1: Outputs are enabled by pulse steering in Single mode. See Register 14-4. 2010 Microchip Technology Inc. PIC18F/LF1XK50 The PWM outputs are multiplexed with I/O pins and are designated P1A, P1B, P1C and P1D. The polarity of the PWM pins is configurable and is selected by setting the CCP1M bits in the CCP1CON register appropriately ...
Page 122
... Pulse Width = T * (CCPR1L<7:0>:CCP1CON<5:4>) * (TMR2 Prescale Value) OSC • Delay = (PWM1CON<6:0>) OSC Note 1: Dead-band delay is programmed using the PWM1CON register (Section 14.4.6 “Programmable Dead-Band Delay mode”). DS41350D-page 122 Pulse 0 Width Period (1) (1) Delay Delay Preliminary 2010 Microchip Technology Inc. PR2+1 ...
Page 123
... OSC • Pulse Width = T * (CCPR1L<7:0>:CCP1CON<5:4>) * (TMR2 Prescale Value) OSC • Delay = (PWM1CON<6:0>) OSC Note 1: Dead-band delay is programmed using the PWM1CON register (Section 14.4.6 “Programmable Dead-Band Delay mode”). 2010 Microchip Technology Inc. PIC18F/LF1XK50 Pulse 0 Width Period (1) (1) Delay Delay ...
Page 124
... Note 1: At this time, the TMR2 register is equal to the PR2 register. 2: Output signals are shown as active-high. FET Driver P1A Load FET Driver P1B V+ FET Driver Load FET Driver Preliminary EXAMPLE OF HALF-BRIDGE PWM OUTPUT Period td (1) ( FET Driver FET Driver 2010 Microchip Technology Inc. ...
Page 125
... P1A, P1B, P1C and P1D outputs are multiplexed with the PORT data latches. The associated TRIS bits must be cleared to configure the P1A, P1B, P1C and P1D pins as outputs. FIGURE 14-8: EXAMPLE OF FULL-BRIDGE APPLICATION P1A P1B P1C P1D 2010 Microchip Technology Inc. PIC18F/LF1XK50 V+ QA FET Driver Load FET Driver QB ...
Page 126
... Forward Mode (2) P1A Pulse Width (2) P1B (2) P1C (2) P1D (1) Reverse Mode Pulse Width (2) P1A (2) P1B (2) P1C (2) P1D (1) Note 1: At this time, the TMR2 register is equal to the PR2 register. 2: Output signal is shown as active-high. DS41350D-page 126 Period (1) Period (1) Preliminary 2010 Microchip Technology Inc. ...
Page 127
... P1C (Active-High) P1D (Active-High) Pulse Width Note 1: The direction bit P1M1 of the CCP1CON register is written any time during the PWM cycle. 2010 Microchip Technology Inc. PIC18F/LF1XK50 The Full-Bridge mode does not provide dead-band delay. As one output is modulated at a time, dead-band delay is generally not required ...
Page 128
... PWM cycle before enabling the PWM pin output drivers. The completion of a full PWM cycle is indicated by the TMR2IF bit of the PIR1 register being set as the second PWM period begins. DS41350D-page 128 Forward Period Reverse Period Preliminary PW OFF – T OFF ON 2010 Microchip Technology Inc. ...
Page 129
... PSSBDn: Pins P1B and P1D Shutdown State Control bits 00 = Drive pins P1B and P1D to ‘0’ Drive pins P1B and P1D to ‘1’ Pins P1B and P1D tri-state 2010 Microchip Technology Inc. PIC18F/LF1XK50 A shutdown condition is indicated by the ECCPASE (Auto-Shutdown Event Status) bit of the ECCPAS register. If the bit is a ‘ ...
Page 130
... FIGURE 14-12: PWM AUTO-SHUTDOWN WITH FIRMWARE RESTART (PRSEN = 0) Shutdown Event ECCPASE bit PWM Activity Start of PWM Period DS41350D-page 130 is a condition PWM Period Normal PWM Shutdown Shutdown Event Occurs Event Clears Preliminary ECCPASE Cleared by Firmware PWM Resumes 2010 Microchip Technology Inc. ...
Page 131
... ECCPASE bit will be cleared via hardware and normal operation will resume. FIGURE 14-13: PWM AUTO-SHUTDOWN WITH AUTO-RESTART ENABLED (PRSEN = 1) Shutdown Event ECCPASE bit PWM Activity Start of PWM Period 2010 Microchip Technology Inc. PIC18F/LF1XK50 PWM Period Normal PWM Shutdown Shutdown Event Occurs Event Clears Preliminary PWM Resumes ...
Page 132
... Pulse Width (2) P1A td (2) P1B ( Dead-Band Delay Note 1: At this time, the TMR2 register is equal to the PR2 register. 2: Output signals are shown as active-high. V+ FET Driver P1A Load FET Driver P1B V- Preliminary EXAMPLE OF HALF-BRIDGE PWM OUTPUT Period td (1) ( 2010 Microchip Technology Inc. ...
Page 133
... PWM restarts automatically 0 = Upon auto-shutdown, ECCPASE must be cleared by software to restart the PWM bit 6-0 PDC<6:0>: PWM Delay Count bits PDCn = Number of F should transition active and the actual time it transitions active 2010 Microchip Technology Inc. PIC18F/LF1XK50 R/W-0 R/W-0 PDC4 PDC3 U = Unimplemented bit, read as ‘ ...
Page 134
... PWM outputs enabled. R/W-0 R/W-0 R/W-0 STRSYNC STRD STRC U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared Preliminary Auto-shutdown mode”. An (1) R/W-0 R/W-1 STRB STRA bit Bit is unknown 2010 Microchip Technology Inc. ...
Page 135
... TRIS Note 1: Port outputs are configured as shown when the CCP1CON register bits P1M<1:0> and CCP1M<3:2> = 11. 2: Single PWM output requires setting at least one of the STRx bits. 2010 Microchip Technology Inc. PIC18F/LF1XK50 P1A pin P1B pin P1C pin P1D pin Preliminary ...
Page 136
... EXAMPLE OF STEERING EVENT AT BEGINNING OF INSTRUCTION (STRSYNC = 1) PWM STRn P1<D:A> PORT Data DS41350D-page 136 Figures 14-17 and 14-18 illustrate the timing diagrams of the PWM steering depending on the STRSYNC setting. PORT Data P1n = PWM P1n = PWM Preliminary 2010 Microchip Technology Inc. PORT Data ...
Page 137
... Both Power-on Reset and subsequent Resets will force all ports to Input mode and the CCP registers to their Reset states. This forces the enhanced CCP module to reset to a state compatible with the standard CCP module. 2010 Microchip Technology Inc. PIC18F/LF1XK50 Preliminary DS41350D-page 137 ...
Page 138
... USBIE TMR3IE — 290 USBIP TMR3IP — 290 TRISC1 TRISC0 290 288 288 TMR1CS TMR1ON 288 288 288 288 289 289 TMR3CS TMR3ON 289 289 289 CCP1M1 CCP1M0 289 PSSBD1 PSSBD0 289 PDC2 PDC1 PDC0 289 2010 Microchip Technology Inc. ...
Page 139
... The I C interface supports the following modes in hardware: • Master mode • Multi-Master mode • Slave mode 2010 Microchip Technology Inc. PIC18F/LF1XK50 15.2 SPI Mode The SPI mode allows 8 bits of data to be synchronously transmitted and received simultaneously. All four modes ...
Page 140
... SSPIF interrupt is set. During transmission, double-buffered. A write to SSPBUF will write to both SSPBUF and SSPSR. R-0 R Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared (1) Preliminary the SSPBUF is not R-0 R bit Bit is unknown 2010 Microchip Technology Inc. ...
Page 141
... In Master mode, the overflow bit is not set since each new reception (and transmission) is initiated by writing to the SSPBUF register. 2: When enabled, these pins must be properly configured as input or output. 3: Bit combinations not specifically listed here are either reserved or implemented in I 2010 Microchip Technology Inc. PIC18F/LF1XK50 R/W-0 R/W-0 R/W-0 CKP ...
Page 142
... Example 15-1 shows the loading of the SSPBUF (SSPSR) for data transmission. The SSPSR is not directly readable or writable and can only be accessed by addressing the SSPBUF register. Additionally, the MSSP STATUS register (SSPSTAT) indicates the various status conditions. Preliminary 2010 Microchip Technology Inc. ...
Page 143
... Shift Register (SSPSR) LSb MSb General I/O Processor 1 2010 Microchip Technology Inc. PIC18F/LF1XK50 15.2.4 TYPICAL CONNECTION Figure 15-2 shows a typical connection between two microcontrollers. The master controller (Processor 1) initiates the data transfer by sending the SCK signal. Data is shifted out of both shift registers on their pro- grammed clock edge and latched on the opposite edge of the clock ...
Page 144
... SMP bit. The time when the SSPBUF is loaded with the received data is shown. bit 5 bit 4 bit 2 bit 1 bit 3 bit 5 bit 4 bit 3 bit 2 bit 1 Preliminary give waveforms for SPI ) Clock Modes bit 0 bit 0 bit 0 bit 0 2010 Microchip Technology Inc. ...
Page 145
... Input Sample (SMP = 0) SSPIF Interrupt Flag SSPSR to SSPBUF 2010 Microchip Technology Inc. PIC18F/LF1XK50 15.2.7 SLAVE SELECT SYNCHRONIZATION The SS pin allows a Synchronous Slave mode. The SPI must be in Slave mode with SS pin control enabled (SSPCON1<3:0> = 0100). When the SS pin is low, transmission and reception are enabled and the SDO pin is driven ...
Page 146
... CKE = 1) Write to SSPBUF SDO bit 7 SDI (SMP = 0) bit 7 Input Sample (SMP = 0) SSPIF Interrupt Flag SSPSR to SSPBUF DS41350D-page 146 bit 6 bit 5 bit 4 bit 3 bit 2 bit 6 bit 2 bit 5 bit 4 bit 3 Preliminary ) 0 bit 1 bit 0 bit 0 bit 1 bit 0 bit 0 2010 Microchip Technology Inc. ...
Page 147
... SSPSTAT SMP CKE Legend: Shaded cells are not used by the MSSP in SPI mode. 2010 Microchip Technology Inc. PIC18F/LF1XK50 Transmit/Receive Shift register. When all 8 bits have been received, the MSSP interrupt flag bit will be set and if enabled, will wake the device. ...
Page 148
... SSPBUF Addr Match and the SSPIF interrupt is set. During transmission, double-buffered. A write to SSPBUF will write to both SSPBUF and SSPSR. Set, Reset S, P bits (SSPSTAT Reg) Preliminary mode operation. The 2 C the SSPBUF is not 2010 Microchip Technology Inc. ...
Page 149
... This bit holds the R/W bit information following the last address match. This bit is only valid from the address match to the next Start bit, Stop bit or not ACK bit. 3: ORing this bit with SEN, RSEN, PEN, RCEN or ACKEN will indicate if the Master mode is active. 2010 Microchip Technology Inc. PIC18F/LF1XK50 2 C MODE) ...
Page 150
... DS41350D-page 150 2 C MODE) R/W-0 R/W-0 R/W-0 CKP SSPM3 SSPM2 U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared 2 C conditions were not valid for a trans- /(4 * (SSPADD + 1)) OSC Preliminary R/W-0 R/W-0 SSPM1 SSPM0 bit Bit is unknown 2010 Microchip Technology Inc. ...
Page 151
... For bits ACKEN, RCEN, PEN, RSEN, SEN: If the I be set (no spooling) and the SSPBUF may not be written (or writes to the SSPBUF are disabled). 2: Value that will be transmitted when the user initiates an Acknowledge sequence at the end of a receive. 2010 Microchip Technology Inc. PIC18F/LF1XK50 2 C MODE) ...
Page 152
... SSPIF, BF, R/W are set). 9. Read the SSPBUF register (clears bit BF) and clear flag bit, SSPIF. 10. Load SSPBUF with byte the slave is to transmit, sets the BF bit. 11. Set the CKP bit to release SCL. Preliminary Addressing 2010 Microchip Technology Inc. ...
Page 153
... The clock must be released by setting the CKP bit of the SSPCON1 register. See Section 15.3.4 “Clock Stretching” for more detail. 2010 Microchip Technology Inc. PIC18F/LF1XK50 15.3.3.3 Transmission When the R/W bit of the incoming address byte is set and an address match occurs, the R/W bit of the SSPSTAT register is set ...
Page 154
... PIC18F/LF1XK50 2 FIGURE 15-8: I C™ SLAVE MODE TIMING WITH SEN = 0 (RECEPTION, 7-BIT ADDRESS) DS41350D-page 154 Preliminary 2010 Microchip Technology Inc. ...
Page 155
... FIGURE 15-9: I C™ SLAVE MODE TIMING (TRANSMISSION, 7-BIT ADDRESS) 2010 Microchip Technology Inc. PIC18F/LF1XK50 Preliminary DS41350D-page 155 ...
Page 156
... PIC18F/LF1XK50 2 FIGURE 15-10: I C™ SLAVE MODE TIMING WITH SEN = 0 (RECEPTION, 10-BIT ADDRESS) DS41350D-page 156 Preliminary 2010 Microchip Technology Inc. ...
Page 157
... FIGURE 15-11: I C™ SLAVE MODE TIMING (TRANSMISSION, 10-BIT ADDRESS) 2010 Microchip Technology Inc. PIC18F/LF1XK50 Preliminary DS41350D-page 157 ...
Page 158
... U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared 2 C address match 2 (1) C Slave mode, 10-bit Address 2 C address match Preliminary 2 C Slave mode (7-bit or R/W-1 R/W-1 (1) MSK1 MSK0 bit Bit is unknown 2 C address match 2 C address match 2010 Microchip Technology Inc. ...
Page 159
... ADD<7:0>: Eight Least Significant bits of 10-bit address 7-Bit Slave mode: bit 7-1 ADD<6:0>: 7-bit address bit 0 Not used: Unused in this mode. Bit state is a “don’t care.” 2010 Microchip Technology Inc. PIC18F/LF1XK50 R/W-0 R/W-0 R/W-0 ADD4 ADD3 ADD2 U = Unimplemented bit, read as ‘ ...
Page 160
... UA bit is not set, the module is now configured in Transmit mode and clock stretching is automatic with the hard- ware clearing CKP 7-bit Slave Transmit mode (see Figure 15-11). Preliminary data transfer sequence (see 2010 Microchip Technology Inc. ...
Page 161
... CKP bit will not violate the minimum high time requirement for SCL (see Figure 15-12). FIGURE 15-12: CLOCK SYNCHRONIZATION TIMING SDA DX SCL CKP WR SSPCON1 2010 Microchip Technology Inc. PIC18F/LF1XK50 Master device asserts clock Master device deasserts clock Preliminary DX – 1 DS41350D-page 161 ...
Page 162
... PIC18F/LF1XK50 2 FIGURE 15-13: I C™ SLAVE MODE TIMING WITH SEN = 1 (RECEPTION, 7-BIT ADDRESS) DS41350D-page 162 Preliminary 2010 Microchip Technology Inc. ...
Page 163
... FIGURE 15-14: I C™ SLAVE MODE TIMING WITH SEN = 1 (RECEPTION, 10-BIT ADDRESS) 2010 Microchip Technology Inc. PIC18F/LF1XK50 Preliminary DS41350D-page 163 ...
Page 164
... Acknowledge (Figure 15-15). Address is compared to General Call Address after ACK, set interrupt R ACK Cleared by software SSPBUF is read Preliminary Receiving Data ACK ‘0’ ‘1’ 2010 Microchip Technology Inc. ...
Page 165
... Generate a Stop condition on SDA and SCL. FIGURE 15-16: MSSP BLOCK DIAGRAM (I SDA SDA In SCL SCL In Bus Collision 2010 Microchip Technology Inc. PIC18F/LF1XK50 Note: The MSSP module, when configured Master mode, does not allow queueing of events. For instance, the user is not ...
Page 166
... ACKSTAT bit of the SSPCON2 register. 10. The MSSP module generates an interrupt at the end of the ninth clock cycle by setting the SSPIF bit. 11. The user generates a Stop condition by setting the PEN bit of the SSPCON2 register. 12. Interrupt is generated once the Stop condition is complete. Preliminary 2010 Microchip Technology Inc. ...
Page 167
... The I C interface does not conform to the 400 kHz I 100 kHz) in all details, but may be used with care where higher rates are required by the application. 2010 Microchip Technology Inc. PIC18F/LF1XK50 Table 15-3 demonstrates clock rates based on instruction cycles and the BRG value loaded into SSPADD ...
Page 168
... BRG 03h Value BRG Reload DS41350D-page 168 DX – 1 SCL allowed to transition high BRG decrements on Q2 and Q4 cycles 02h 01h 00h (hold off) SCL is sampled high, reload takes place and BRG starts its count Preliminary 03h 02h 2010 Microchip Technology Inc. ...
Page 169
... Start condition is complete. FIGURE 15-19: FIRST START BIT TIMING Write to SEN bit occurs here SDA SCL 2010 Microchip Technology Inc. PIC18F/LF1XK50 Note the beginning of the Start condition, the SDA and SCL pins are already sam- pled low during the Start condition, the ...
Page 170
... SSPCON2 is disabled until the Repeated Start condition is complete. S bit set by hardware SDA = 1, At completion of Start bit, SCL = 1 hardware clears RSEN bit and sets SSPIF BRG BRG BRG Write to SSPBUF occurs here T BRG Sr = Repeated Start Preliminary 1st bit T BRG 2010 Microchip Technology Inc. ...
Page 171
... WCOL is set and the contents of the buf- fer are unchanged (the write doesn’t occur). WCOL must be cleared by software before the next transmission. 2010 Microchip Technology Inc. PIC18F/LF1XK50 15.3.10.3 ACKSTAT Status Flag In Transmit mode, the ACKSTAT bit of the SSPCON2 ...
Page 172
... PIC18F/LF1XK50 2 FIGURE 15-21: I C™ MASTER MODE WAVEFORM (TRANSMISSION 10-BIT ADDRESS) DS41350D-page 172 Preliminary 2010 Microchip Technology Inc. ...
Page 173
... FIGURE 15-22: I C™ MASTER MODE WAVEFORM (RECEPTION, 7-BIT ADDRESS) 2010 Microchip Technology Inc. PIC18F/LF1XK50 Preliminary DS41350D-page 173 ...
Page 174
... BRG SCL brought high after T BRG SDA asserted low before rising edge of clock to setup Stop condition Preliminary (Baud Rate Generator rollover count) later, the PEN bit is BRG WCOL Status Flag ACKEN automatically cleared Cleared in software BRG 2010 Microchip Technology Inc. ...
Page 175
... FIGURE 15-25: BUS COLLISION TIMING FOR TRANSMIT AND ACKNOWLEDGE Data changes while SCL = 0 SDA SCL BCLIF 2010 Microchip Technology Inc. PIC18F/LF1XK50 15.3.17 MULTI -MASTER COMMUNICATION, BUS COLLISION AND BUS ARBITRATION Multi-Master mode support is achieved by bus arbitra- tion. When the master outputs address/data bits onto the SDA pin, arbitration takes place when the master outputs a ‘ ...
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... Repeated Start or Stop conditions. SEN cleared automatically because of bus collision. SSP module reset into Idle state. SSPIF and BCLIF are cleared by software SSPIF and BCLIF are cleared by software Preliminary 2010 Microchip Technology Inc. ...
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... BRG RESET DUE TO SDA ARBITRATION DURING START CONDITION Less than T SDA pulled low by other master. SDA Reset BRG and assert SDA. SCL SEN BCLIF S SSPIF 2010 Microchip Technology Inc. PIC18F/LF1XK50 SDA = 0, SCL = BRG BRG SCL = 0 before SDA = 0, bus collision occurs. Set BCLIF. SDA = 0, SCL = 1 ...
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... Repeated Start condition is complete. Sample SDA when SCL goes high. If SDA = 0, set BCLIF and release SDA and SCL. Cleared by software T T BRG BRG Preliminary 2010 Microchip Technology Inc. ‘0’ ‘0’ Interrupt cleared by software ‘0’ ...
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... SCL PEN BCLIF P SSPIF 2010 Microchip Technology Inc. PIC18F/LF1XK50 The Stop condition begins with SDA asserted low. When SDA is sampled low, the SCL pin is allowed to float. When the pin is sampled high (clock arbitration), the Baud Rate Generator is loaded with SSPADD and counts down to 0 ...
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... TMR1IP 290 TMR2IF TMR1IF 290 TMR2IE TMR1IE 290 — 290 TMR3IP — 290 TMR3IF — 290 TMR3IE 2 C Master 288 288 SSPM1 SSPM0 288 RSEN SEN 288 MSK1 MSK0 290 UA BF 288 — — — 290 2010 Microchip Technology Inc. ...
Page 181
... NOTES: 2010 Microchip Technology Inc. PIC18F/LF1XK50 Preliminary DS41350D-page 181 ...
Page 182
... PIC18F/LF1XK50 DS41350D-page 182 Preliminary 2010 Microchip Technology Inc. ...
Page 183
... SPBRGH SPBRG BRGH BRG16 2010 Microchip Technology Inc. PIC18F/LF1XK50 The EUSART module includes the following capabilities: • Full-duplex asynchronous transmit and receive • Two-character input buffer • One-character output buffer • Programmable 8-bit or 9-bit character length • Address detection in 9-bit mode • ...
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... DS41350D-page 184 MSb Data Stop Recovery F OSC ÷ x16 x64 0 0 FERR 0 Register 16-1, Preliminary CREN OERR RCIDL RSR Register LSb • • • ( START RX9 FIFO RX9D RCREG Register 8 Data Bus RCIF Interrupt RCIE 2010 Microchip Technology Inc. ...
Page 185
... TX/CK I/O pin as an output. If the TX/CK pin is shared with an analog peripheral the analog I/O function must be disabled by clearing the corresponding ANSEL bit. 2010 Microchip Technology Inc. PIC18F/LF1XK50 Note 1: When the SPEN bit is set the RX/DT I/O pin is automatically configured as an input, ...
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... GIE and PEIE bits of the INT- CON register are also set 9-bit transmission is selected, the ninth bit should be loaded into the TX9D data bit. 8. Load 8-bit data into the TXREG register. This will start the transmission. Preliminary 2010 Microchip Technology Inc. ...
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... SPBRGH EUSART Baud Rate Generator Register, High Byte SPBRG EUSART Baud Rate Generator Register, Low Byte Legend: — = unimplemented locations read as ‘0’. Shaded cells are not used for asynchronous transmission. 2010 Microchip Technology Inc. PIC18F/LF1XK50 bit 0 bit 1 Word 1 bit 0 ...
Page 188
... Setting the DTRXP bit to ‘1’ will invert the receive data resulting in low true idle and data bits. The DTRXP bit controls receive data polarity only in Asynchronous mode. In synchronous mode the DTRXP bit has a different function. Preliminary Receiving Data Receive Data Polarity 2010 Microchip Technology Inc. ...
Page 189
... The error must be cleared by either clearing the CREN bit of the RCSTA register or by resetting the EUSART by clearing the SPEN bit of the RCSTA register. 2010 Microchip Technology Inc. PIC18F/LF1XK50 16.1.2.7 Receiving 9-bit Characters The EUSART supports 9-bit character reception. When ...
Page 190
... If the device has been addressed, clear the ADDEN bit to allow all received data into the receive buffer and generate interrupts. Start bit 7/8 bit 7/8 Stop Stop bit bit 0 bit bit Word 2 Word 1 RCREG RCREG Preliminary Start bit bit 7/8 Stop bit 2010 Microchip Technology Inc. ...
Page 191
... SPBRGH EUSART Baud Rate Generator Register, High Byte SPBRG EUSART Baud Rate Generator Register, Low Byte Legend: — = unimplemented locations read as ‘0’. Shaded cells are not used for asynchronous reception. 2010 Microchip Technology Inc. PIC18F/LF1XK50 Bit 5 Bit 4 Bit 3 Bit 2 ...
Page 192
... Baud Rate Generator to compensate for a gradual change in the peripheral clock frequency. R/W-0 R/W-0 (1) SYNC SENDB U = Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared (1) Preliminary feature (see Section 16.3.1 R/W-0 R-1 R/W-0 BRGH TRMT TX9D bit Bit is unknown 2010 Microchip Technology Inc. ...
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... OERR: Overrun Error bit 1 = Overrun error (can be cleared by clearing bit CREN overrun error bit 0 RX9D: Ninth bit of Received Data This can be address/data bit or a parity bit and must be calculated by user firmware. 2010 Microchip Technology Inc. PIC18F/LF1XK50 R/W-0 R/W-0 R-0 CREN ...
Page 194
... Auto-Baud Detect mode is enabled (clears when auto-baud is complete Auto-Baud Detect mode is disabled Synchronous mode: Don’t care DS41350D-page 194 R/W-0 R/W-0 U-0 CKTXP BRG16 — Unimplemented bit, read as ‘0’ ‘0’ = Bit is cleared Preliminary R/W-0 R/W-0 WUE ABDEN bit Bit is unknown 2010 Microchip Technology Inc. ...
Page 195
... SPBRG EUSART Baud Rate Generator Register, Low Byte Legend: — = unimplemented, read as ‘0’. Shaded cells are not used by the BRG. 2010 Microchip Technology Inc. PIC18F/LF1XK50 If the system clock is changed during an active receive operation, a receive error or data loss may result. To ...
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... F = 11.0592 MHz OSC SPBRG SPBRG Actual % value value Rate Error (decimal) (decimal) — — — — — — — — — — — — 77 9600 0. 10473 0. 19.20k 0. 57.60k 0.00 11 — 115.2k 0.00 5 2010 Microchip Technology Inc. ...
Page 197
... Microchip Technology Inc. PIC18F/LF1XK50 SYNC = 0, BRGH = 1, BRG16 = 4.000 MHz F = 3.6864 MHz OSC OSC SPBRG % Actual % value Rate Error Rate Error (decimal) — — ...
Page 198
... F = 1.000 MHz OSC SPBRGH SPBRGH Actual % :SPBRG :SPBRG Rate Error (decimal) (decimal) 3071 300.1 0.04 832 767 1202 0.16 207 383 2404 0.16 103 95 9615 0. 10417 0. 19.23k 0. — — — 7 — — — 2010 Microchip Technology Inc. ...
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... SPBRG SPBRGH Note 1: The ABD sequence requires the EUSART module to be configured in Asynchronous mode. 2010 Microchip Technology Inc. PIC18F/LF1XK50 and SPBRG registers are clocked at 1/8th the BRG base clock rate. The resulting byte measurement is the average bit time when clocked at full speed. ...
Page 200
... To ensure that no actual data is lost, check the RCIDL bit to verify that a receive operation is not in process before setting the WUE bit receive operation is not occurring, the WUE bit may then be set just prior to entering the Sleep mode. Preliminary 2010 Microchip Technology Inc. ...