Datasheet

PIC18CXX2
DS39026D-page 130  1999-2013 Microchip Technology Inc.
FIGURE 14-8: I
2
C SLAVE MODE WAVEFORMS FOR RECEPTION (7-BIT ADDRESS)
FIGURE 14-9: I
2
C SLAVE MODE WAVEFORMS FOR TRANSMISSION (7-BIT ADDRESS)
P
9
8
765
D0
D1
D2
D3D4
D5
D6D7
S
A7 A6 A5 A4
A3 A2 A1SDA
SCL
123456789
1234
56
7
89
1234
Bus Master
terminates
transfer
Bit SSPOV is set because the SSPBUF register is still full.
Cleared in software
SSPBUF register is read
ACK
Receiving Data
Receiving Data
D0
D1
D2
D3D4
D5
D6D7
ACK
R/W=0
Receiving Address
SSPIF
BF (SSPSTAT<0>)
SSPOV (SSPCON1<6>)
Not ACK
ACK is not sent.
SDA
SCL
SSPIF
BF (SSPSTAT<0>)
CKP (SSPCON1<4>)
A7 A6 A5 A4 A3 A2 A1 ACK
D7 D6 D5 D4 D3 D2 D1 D0
Not
ACKTransmitting DataR/W = 1Receiving Address
123456789 123456789
P
Cleared in software
SSPBUF is written in software
From SSP Interrupt
Service Routine
Set bit after writing to SSPBUF
S
Data in
sampled
SCL held low
while CPU
responds to SSPIF
(the SSPBUF must be written to
before the CKP bit can be set)
R/W
= 0