PIC18F258 Datasheet, PDF (194/384 Pages) Microchip Technology – High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN

PIC18FXX8
FIGURE 18-6:
SYNCHRONOUS TRANSMISSION
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
RC7/RX/DT
bit 0
bit 1
bit 2
bit 7
bit 0
bit 1
bit 7
pin
Word 1
Word 2
RC6/TX/CK
pin
Write to
TXREG Reg
TXIF bit
(Interrupt Flag)
Write Word 1
Write Word 2
TRMT bit^TRMT
’1’
’1’
TXEN bit
Note: Sync Master mode; SPBRG = ’0’; continuous transmission of two 8-bit words.
FIGURE 18-7:
SYNCHRONOUS TRANSMISSION (THROUGH TXEN)
RC7/RX/DT pin
bit0
bit1
bit2
bit6
bit7
RC6/TX/CK pin
Write to
TXREG reg
TXIF bit
TRMT bit
TXEN bit
DS41159B-page 192
Preliminary
 2002 Microchip Technology Inc.