PIC16F1938_13 Datasheet, PDF (243/488 Pages) Microchip Technology – 28/40/44-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver

FIGURE 24-7:
SPI DAISY-CHAIN CONNECTION
SPI Master
SCK
SDO
SDI
General I/O
PIC16(L)F1938/9
SCK
SDI
SDO
SS
SPI Slave
#1
SCK
SDI
SDO
SS
SPI Slave
#2
SCK
SDI
SDO
SS
SPI Slave
#3
FIGURE 24-8:
SS
SCK
(CKP = 0
CKE = 0)
SCK
(CKP = 1
CKE = 0)
Write to
SSPBUF
SSPBUF to
SSPSR
SLAVE SELECT SYNCHRONOUS WAVEFORM
Shift register SSPSR
and bit count are reset
SDO
SDI
Input
Sample
SSPIF
Interrupt
Flag
SSPSR to
SSPBUF
bit 7
bit 6
bit 7
bit 7 bit 6
bit 7
bit 0
bit 0
 2011-2013 Microchip Technology Inc.
DS40001574C-page 243