PIC18F8520-I/PT Microchip Technology Inc., PIC18F8520-I/PT Datasheet - Page 207

• Manufacturer Part Number: PIC18F8520-I/PT
• Description: 80 PIN, 32 KB FLASH, 2048 RAM, 68 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F8520-I/PT

• A/d Inputs: 16-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 10 MIPS
• Eeprom Memory: 1024 Bytes
• Input Output: 68
• Interface: I2C/SPI/UART/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 80-pin TQFP
• Programmable Memory: 32K Bytes
• Ram Size: 2K Bytes
• Speed: 40 MHz
• Timers: 2-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part

FIGURE 18-2:
FIGURE 18-3:
TABLE 18-6:
 2004 Microchip Technology Inc.
INTCON
PIR1
PIE1
IPR1
PIR3
PIE3
IPR3
RCSTAx
TXREGx
TXSTAx
SPBRGx
Legend:
Note 1:
(Interrupt Reg. Flag)
RC6/TX1/CK1 (pin)
Name
RC6/TX1/CK1 (pin)
Reg. Empty Flag)
Note:
Reg. Empty Flag)
(Transmit Shift
Reg. Empty Flag)
Write to TXREG
Write to TXREG
(Transmit Buffer
(Transmit Shift
(1)
(1)
BRG Output
(Shift Clock)
(1)
BRG Output
(Shift Clock)
(1)
TRMT bit
TRMT bit
This timing diagram shows two consecutive transmissions.
x = unknown, – = unimplemented locations read as ‘0’. Shaded cells are not used for asynchronous transmission.
Register names generically refer to both of the identically named registers for the two USART modules, where ‘x’
indicates the particular module. Bit names and Reset values are identical between modules.
USART Transmit Register
Baud Rate Generator Register
TXIF bit
TXIF bit
GIE/GIEH
PSPIF
PSPIE
PSPIP
CSRC
SPEN
Bit 7
—
—
—
PIC18F6520/8520/6620/8620/6720/8720
REGISTERS ASSOCIATED WITH ASYNCHRONOUS TRANSMISSION
ASYNCHRONOUS TRANSMISSION
ASYNCHRONOUS TRANSMISSION (BACK TO BACK)
PEIE/GIEL TMR0IE INT0IE
Transmit Shift Reg.
Word 1
Transmit Shift Reg
Word 1
ADIF
ADIE
ADIP
Bit 6
RX9
TX9
Word 1
Word 1
—
—
—
RC1IE
RC1IP
RC2IE
RC2IP
Start bit
RC1IF
RC2IF
SREN
TXEN
Bit 5
Start bit
Word 2
TX1IF
TX1IE
TX1IP
TX2IF
TX2IE
TX2IP
CREN
SYNC
Bit 4
bit 0
bit 0
TMR4IF
TMR4IE
TMR4IP
ADDEN
SSPIF
SSPIE
SSPIP
RBIE
Bit 3
—
bit 1
Word 1
bit 1
TMR0IF
CCP1IF
CCP1IE
CCP1IP
CCP5IF
CCP5IE
CCP5IP
Word 1
BRGH
FERR
Bit 2
TMR2IF
TMR2IE
TMR2IP
CCP4IF
CCP4IE
CCP4IP
INT0IF
OERR
TRMT
Bit 1
bit 7/8
Word 2
Transmit Shift Reg.
TMR1IF
TMR1IE
TMR1IP
CCP3IE
CCP3IP
CCP3IF
RX9D
bit 7/8
TX9D
RBIF
Bit 0
Stop bit
Stop bit
0000 0000
0000 0000
0000 0000
0111 1111
--00 0000
--00 0000
--11 1111
0000 000x
0000 0000
0000 -010
0000 0000
POR, BOR
Value on
Start bit
DS39609B-page 205
Word 2
0000 0000
0000 0000
0000 0000
0111 1111
--00 0000
--00 0000
--11 1111
0000 000x
0000 0000
0000 -010
0000 0000
Value on
all other
Resets
bit 0