Datasheet

 2011-2013 Microchip Technology Inc. DS40001574C-page 259
PIC16(L)F1938/9
FIGURE 24-19: 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
SDA
SCL
SSPIF
BF
ACKDT
ACKSTAT
CKP
R/W
D/A
Received address
is read from SSPBUF
BF is automatically
cleared after 8th falling
edge of SCL
Data to transmit is
loaded into SSPBUF
Cleared by software
Slave clears
ACKDT to ACK
address
Master’s ACK
response is copied
to SSPSTAT
CKP not cleared
after not ACK
Set by software, releases SCL
ACKTIM is cleared on 9th rising edge of SCL
ACKTIM is set on 8th falling
edge of SCL
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 SDA
to slave for ACK sequence
ACK
ACK
ACKTIM