PIC18C658 MICROCHIP [Microchip Technology], PIC18C658 Datasheet - Page 174

• Manufacturer Part Number: PIC18C658
• Description: High-Performance Microcontrollers with CAN Module
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18CXX8
FIGURE 16-2: ASYNCHRONOUS TRANSMISSION
FIGURE 16-3: ASYNCHRONOUS TRANSMISSION (BACK TO BACK)
TABLE 16-6:
DS30475A-page 174
Name
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE
PIR1
PIE1
IPR1
RCSTA
TXREG USART Transmit Register
TXSTA
SPBRG Baud Rate Generator Register
Legend: x = unknown, - = unimplemented locations read as '0'.
(Transmit buffer
register empty flag)
(Transmit shift
register empty flag)
TXIF bit
(interrupt reg. flag)
RC6/TX/CK (pin)
Note: This timing diagram shows two consecutive transmissions.
RC6/TX/CK (pin)
TRMT bit
(Transmit shift
reg. empty flag)
Write to TXREG
Write to TXREG
TXIF bit
TRMT bit
BRG Output
(shift clock)
BRG Output
(shift clock)
Shaded cells are not used for Asynchronous Transmission.
PSPIE
PSPIP
PSPIF
CSRC
SPEN
Bit 7
REGISTERS ASSOCIATED WITH ASYNCHRONOUS TRANSMISSION
ADIF
ADIE
ADIP
Bit 6
RX9
TX9
Transmit Shift Reg.
Word 1
Transmit Shift Reg
Word 1
Word 1
Word 1
SREN
TXEN
RCIE
RCIP
RCIF
Bit 5
START Bit
START Bit
Word 2
Advanced Information
CREN
SYNC ADDEN BRGH
Bit 4
TXIF
TXIE
TXIP
Bit 0
Bit 0
SSPIE CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000
SSPIP CCP1IP TMR2IP TMR1IP 0000 0000 0000 0000
SSPIF CCP1IF TMR2IF TMR1IF 0000 0000 0000 0000
RBIE
Bit 3
—
Bit 1
Word 1
Bit 1
TMR0IF INT0IF
Word 1
FERR
Bit 2
OERR
TRMT
Bit 1
Bit 7/8
Word 2
Transmit Shift Reg.
RX9D
TX9D
Bit 7/8
RBIF
Bit 0
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STOP Bit
0000 000x 0000 000u
0000 -00x 0000 -00x
0000 0000 0000 0000
0000 0010 0000 0010
0000 0000 0000 0000
STOP Bit
Value on
POR,
BOR
START Bit
Word 2
Value on
RESETS
all other
Bit 0