Information

© 2008 Microchip Technology Inc. DS39646C-page 237
PIC18F8722 FAMILY
FIGURE 19-21: I
2
C™ MASTER MODE WAVEFORM (TRANSMISSION, 7 OR 10-BIT ADDRESS)
SDAx SCLx SSPxIF BF (SSPxSTAT<0>) SEN
A7 A6 A5 A4 A3 A2 A1 ACK
= 0 D7 D6 D5 D4 D3 D2 D1 D0
ACK
Transmitting Data or Second Half
R/W = 0Transmit Address to Slave
123456789 123456789
P
Cleared in software service routine
SSPxBUF is written in software
from MSSP interrupt
After Start condition, SEN cleared by hardware
S
SSPxBUF written with 7-bit address and R/W
,
start transmit
SCLx held low
while CPU
responds to SSPxIF
SEN = 0
of 10-bit Address
Write SSPxCON2<0> (SEN = 1), Start condition begins
From slave, clear ACKSTAT bit SSPxCON2<6>
ACKSTAT in SSPxCON2 =
1
Cleared in software
SSPxBUF written
PEN
R/W
Cleared in software