PIC18LF24K Datasheet, PDF (362/594 Pages) –

FIGURE 26-18: I²C SLAVE, 7-BIT ADDRESS, TRANSMISSION (AHEN = 0)
SDA
SCL
S
SSPxIF
BF
CKP
ACKSTAT
Receiving Address
R/W = 1 ^Automatic
A7 A6 A5 A4 A3 A2 A1
ACK
Master sends
Stop condition
Transmitting Data
Automatic
Transmitting Data
ACK
D7 D6 D5 D4 D3 D2 D1 D0 ACK
D7 D6 D5 D4 D3 D2 D1 D0
123456789
123456789
12345678 9
P
Received address
is read from SSPxBUF
When R/W is set
SCL is always
held low after 9th SCL
falling edge
Cleared by software
Data to transmit is
loaded into SSPxBUF
Set by software
BF is automatically
cleared after 8th falling
edge of SCL
CKP is not
held for not
ACK
R/W
R/W is copied from the
matching address byte
D/A
Indicates an address
has been received
S
P
Masters not ACK
is copied to
ACKSTAT