PIC18CXX2
FIGURE 15-6: SYNCHRONOUS TRANSMISSION
Q1Q2 Q3Q4 Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2 Q3Q4
Q3Q4 Q1Q2 Q3Q4 Q1Q2 Q3Q4 Q1Q2 Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4
Bit 0
Bit 1
Bit 2
Bit 7
Bit 0
Bit 1
WORD 2
Bit 7
RC7/RX/DT pin
RC6/TX/CK pin
WORD 1
Write to
TXREG reg
Write word1
Write word2
TXIF bit
(Interrupt flag)
TRMT
TRMT bit
’1’
’1’
TXEN bit
Note: Sync master mode; SPBRG = ’0’. Continuous transmission of two 8-bit words
FIGURE 15-7: SYNCHRONOUS TRANSMISSION (THROUGH TXEN)
RC7/RX/DT pin
RC6/TX/CK pin
bit0
bit2
bit1
bit6
bit7
Write to
TXREG reg
TXIF bit
TRMT bit
TXEN bit
DS39026B-page 162
Preliminary
7/99 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
