Datasheet

 2010-2012 Microchip Technology Inc. DS41412F-page 235
PIC18(L)F2X/4XK22
FIGURE 15-19: I
2
C SLAVE, 7-BIT ADDRESS, TRANSMISSION (AHEN = 1)
Receiving Address Automatic Transmitting Data Automatic Transmitting Data
A7 A6 A5 A4 A3 A2 A1 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9
SDAx
SCLx
SSPxIF
BF
ACKDT
ACKSTAT
CKP
R/W
D/A
Received address
is read from SSPxBUF
BF is automatically
cleared after 8th falling
edge of SCLx
Data to transmit is
loaded into SSPxBUF
Cleared by software
Slave clears
ACKDT to ACK
address
Master’s ACK
response is copied
to SSPxSTAT
CKP not cleared
after not ACK
Set by software, releases SCLx
ACKTIM is cleared on 9th rising edge of SCLx
ACKTIM is set on 8th falling
edge of SCLx
When AHEN = 1;
CKP is cleared by hardware
after receiving matching
address.
When R/W = 1;
CKP is always
cleared after ACK
S
P
Master sends Stop condition
ACK
R/W = 1
Master releases SDAx
to slave for ACK sequence
ACK
ACK
ACKTIM