Datasheet

PIC18F2420/2520/4420/4520
DS39631E-page 176 © 2008 Microchip Technology Inc.
FIGURE 17-8: I
2
C™ SLAVE MODE TIMING WITH SEN = 0 (RECEPTION, 7-BIT ADDRESSING)
SDA SCL SSPIF BF (SSPSTAT<0>) SSPOV (SSPCON1<6>)
S
12345678912345678912345 789
P
A7 A6 A5 A4 A3 A2 A1 D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D1 D0
ACK
Receiving Data
ACK
Receiving Data
R/W
= 0
ACK
Receiving Address
Cleared in software SSPBUF is read
Bus master terminates transfer
SSPOV is set because SSPBUF is still full. ACK is not sent.
D2
6
(PIR1<3>)
CKP (SSPCON1<4>)
(CKP does not reset to ‘0’ when SEN = 0)