Datasheet

PIC18CXX2
DS39026D-page 140  1999-2013 Microchip Technology Inc.
FIGURE 14-18: I
2
C MASTER MODE WAVEFORM (TRANSMISSION, 7 OR 10-BIT ADDRESS)
SDA SCL SSPIF BF (SSPSTAT<0>) SEN
A7 A6 A5 A4 A3 A2 A1 ACK
= 0 D7D6D5D4D3D2D1D0
ACK
Transmitting Data or Second Half
R/W
= 0Transmit Address to Slave
123456789 123456789
P
Cleared in software service routine
SSPBUF is written in software
From SSP interrupt
After START condition SEN cleared by hardware.
S
SSPBUF written with 7 bit address and R/W
start transmit
SCL held low
while CPU
responds to SSPIF
SEN = 0
of 10-bit Address
Write SSPCON2<0> SEN = 1 START condition begins
From slave clear ACKSTAT bit SSPCON2<6>
ACKSTAT in SSPCON2 = 1
cleared in software
SSPBUF written
PEN
Cleared in software
R/W