Datasheet

PIC16F87XA
DS39582C-page 102  2001-2013 Microchip Technology Inc.
FIGURE 9-21: 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 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
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