PIC32MX440F256H-80I Datasheet, PDF (403/646 Pages) Microchip Technology – 64/100-Pin General Purpose and USB 32-Bit Flash Microcontrollers

PIC32MX3XX/4XX
FIGURE 17-7:
SPI MASTER, FRAME SLAVE MODE32 = 0, MODE16 = 1, SPIFE = 0,
FRMPOL = 1
SCKx
(CKP = 1)
SCK
(CKP = 0)
FSYNC
SDO
SDI
bit 15
bit 15
bit 14
bit 14
bit 13
bit 13
bit 12
bit 12
Write to
SPIxBUF
Sample SSx pin
for Frame Sync Pulse
Receive Samples at SDIx
FIGURE 17-8:
SPI MASTER, FRAME SLAVE CONNECTION DIAGRAM
PIC32MX3XX/4XX
[SPI Master, Frame Slave]
SDOx
PROCESSOR 2
[SPI Slave, Frame Master]
SDIx
SDIx
SCKx
Serial Clock
SDOx
SCKx
SSx
SSx
Frame Sync
Pulse^(1,2)
Note 1: In Framed SPI modes, the SSx pin is used to transmit/receive the frame synchronization pulse.
2: Framed SPI modes require the use of all four pins (i.e., using the SSx pin is not optional).
© 2008 Microchip Technology Inc.
Preliminary
DS61143E-page 401