Datasheet

PIC18F2682/2685/4682/4685

FIGURE 17-21: I

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

Cleared in software service routine

SSPBUF is written in software

from MSSP interrupt

After Start condition, SEN cleared by hardware

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

R/W

Cleared in software