PIC18LF2221-I/SP Microchip Technology, PIC18LF2221-I/SP Datasheet - Page 83
![IC PIC MCU FLASH 2KX16 28DIP](/photos/6/59/65908/150-28-dip_sml.jpg)
PIC18LF2221-I/SP
Manufacturer Part Number
PIC18LF2221-I/SP
Description
IC PIC MCU FLASH 2KX16 28DIP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC18F2221-ISO.pdf
(402 pages)
2.PIC18F2221-ISO.pdf
(8 pages)
3.PIC18F2221-ISO.pdf
(30 pages)
4.PIC18F2221-ISO.pdf
(46 pages)
5.PIC18LF2221-IML.pdf
(394 pages)
6.PIC18F2321-IML.pdf
(396 pages)
Specifications of PIC18LF2221-I/SP
Core Size
8-Bit
Program Memory Size
4KB (2K x 16)
Core Processor
PIC
Speed
40MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, HLVD, POR, PWM, WDT
Number Of I /o
25
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 10x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-DIP (0.300", 7.62mm)
Controller Family/series
PIC18
No. Of I/o's
25
Eeprom Memory Size
256Byte
Ram Memory Size
512Byte
Cpu Speed
40MHz
No. Of Timers
4
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- PIC18F2221-ISO PDF datasheet
- PIC18F2221-ISO PDF datasheet #2
- PIC18F2221-ISO PDF datasheet #3
- PIC18F2221-ISO PDF datasheet #4
- PIC18LF2221-IML PDF datasheet #5
- PIC18F2321-IML PDF datasheet #6
- Current page: 83 of 394
- Download datasheet (7Mb)
EXAMPLE 6-3:
6.5.2
Depending on the application, good programming
practice may dictate that the value written to the
memory should be verified against the original value.
This should be used in applications where excessive
writes can stress bits near the specification limit.
6.5.3
If a write is terminated by an unplanned event, such as
loss of power or an unexpected Reset, the memory
location just programmed should be verified and repro-
grammed if needed. If the write operation is interrupted
by a MCLR Reset or a WDT Time-out Reset during
normal operation, the user can check the WRERR bit
and rewrite the location(s) as needed.
TABLE 6-2:
© 2005 Microchip Technology Inc.
TBLPTRU
TBPLTRH Program Memory Table Pointer High Byte (TBLPTR<15:8>)
TBLPTRL Program Memory Table Pointer Low Byte (TBLPTR<7:0>)
TABLAT
INTCON
EECON2
EECON1
IPR2
PIR2
PIE2
Legend: — = unimplemented, read as ‘0’. Shaded cells are not used during Flash/EEPROM access.
PROGRAM_MEMORY
Name
WRITE VERIFY
UNEXPECTED TERMINATION OF
WRITE OPERATION
Program Memory Table Latch
EEPROM Control Register 2 (not a physical register)
GIE/GIEH PEIE/GIEL TMR0IE
OSCFIP
OSCFIF
OSCFIE
EEPGD
Bit 7
—
REGISTERS ASSOCIATED WITH PROGRAM FLASH MEMORY
BCF
MOVLW
MOVWF
MOVLW
MOVWF
BSF
NOP
BSF
DECFSZ COUNTER_HI
GOTO
BCF
WRITING TO FLASH PROGRAM MEMORY (CONTINUED)
CFGS
CMIP
CMIF
CMIE
Bit 6
INTCON, GIE
55h
EECON2
AAh
EECON2
EECON1, WR
INTCON, GIE
PROGRAM_LOOP
EECON1, WREN
—
bit 21
Bit 5
—
—
—
—
Advance Information
Program Memory Table Pointer Upper Byte (TBLPTR<20:16>)
INT0IE
FREE
EEIP
EEIF
EEIE
Bit 4
; disable interrupts
; required sequence
; write 55H
; write AAH
; start program (CPU stall)
; re-enable interrupts
; loop until done
; disable write to memory
WRERR
BCLIP
BCLIF
BCLIE
RBIE
Bit 3
6.5.4
To protect against spurious writes to Flash program
memory, the write initiate sequence must also be
followed. See Section 23.0 “Special Features of the
CPU” for more detail.
6.6
See Section 23.5 “Program Verification and Code
Protection” for details on code protection of Flash
program memory.
PIC18F4321 FAMILY
TMR0IF
HLVDIP
HLVDIF
HLVDIE
Flash Program Operation During
Code Protection
WREN
Bit 2
PROTECTION AGAINST
SPURIOUS WRITES
TMR3IP
TMR3IF
TMR3IE
INT0IF
Bit 1
WR
CCP2IP
CCP2IF
CCP2IE
RBIF
Bit 0
RD
DS39689A-page 81
Values on
Reset
page
49
49
49
49
49
51
51
52
52
52
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