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ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller SPDIP 28 8-Bit 40 MHz I/O number 22
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PIC18CXX2
DS39026D-page 126 1999-2013 Microchip Technology Inc.
FIGURE 14-5: SPI MODE WAVEFORM (SLAVE MODE WITH CKE = 0)
FIGURE 14-6: SPI MODE WAVEFORM (SLAVE MODE WITH CKE = 1)
SCK
(CKP = 1
SCK
(CKP = 0
Input
Sample
SDI
bit7
bit0
SDO bit7
bit6
bit5 bit4
bit3
bit2
bit1 bit0
SSPIF
Interrupt
(SMP = 0)
CKE = 0)
CKE = 0)
(SMP = 0)
Write to
SSPBUF
SSPSR to
SSPBUF
SS
Flag
optional
Next Q4 cycle
after Q2
SCK
(CKP = 1
SCK
(CKP = 0
Input
Sample
SDI
bit7
bit0
SDO bit7
bit6
bit5 bit4
bit3
bit2
bit1 bit0
SSPIF
Interrupt
(SMP = 0)
CKE = 1)
CKE = 1)
(SMP = 0)
Write to
SSPBUF
SSPSR to
SSPBUF
SS
Flag
not optional
Next Q4 cycle
after Q2