Microchip Technology DM183037 Data Sheet
PIC18F97J94 FAMILY
DS30575A-page 360
2012 Microchip Technology Inc.
FIGURE 20-5:
SPI MODE WAVEFORM (SLAVE MODE WITH CKE =
0
)
FIGURE 20-6:
SPI MODE WAVEFORM (SLAVE MODE WITH CKE = 1)
SCKx
(CKP = 1
SCKx
(CKP = 0
Input
Sample
Sample
SDIx
bit 7
SDOx
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
SSPxIF
Interrupt
(SMP = 0)
CKE = 0)
CKE = 0)
(SMP = 0)
Write to
SSPxBUF
SSPxBUF
SSPxSR to
SSPxBUF
SSPxBUF
SSx
Flag
Optional
Next Q4 Cycle
after Q2
after Q2
bit 0
SCKx
(CKP = 1
SCKx
(CKP = 0
Input
Sample
Sample
SDIx
bit 7
bit 0
SDOx
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
SSPxIF
Interrupt
(SMP = 0)
CKE = 1)
CKE = 1)
(SMP = 0)
Write to
SSPxBUF
SSPxBUF
SSPxSR to
SSPxBUF
SSx
Flag
Not Optional
Next Q4 Cycle
after Q2
after Q2