PIC32MZ SPI pins

SPI signals on PIC32MZ microcontroller

On PIC32MZ chip, a pin for SDIx signal is selected by writing appropriate value to SDIxR register.

SPI register	Available pins
SDI1R, SDI3R, SDI5R	RA14, RB5, RB9, RB10, RC1, RC14, RD2, RD6, RD10, RD14, RF1, RF4, RG1, RG8
SDI2R, SDI4R	RA15, RB1, RB3, RC4, RC13, RD3, RD7, RD11, RD15, RE5, RF0, RF5, RG0, RG7
SDI6R	RB2, RB6, RB14, RC2, RD0, RD1, RD5, RE8, RF2, RF3, RF13, RG9

A pin for SDOx signal is selected by writing appropriate value to the pin function register.

Pin register	SPI signals
RPA15R, RPB1R, RPB3R, RPC4R, RPC13R, RPD3R, RPD7R, RPD11R, RPD15R, RPE5R, RPF0R, RPF5R, RPG0R, RPG7R	SDO1, SDO2, SDO3, SDO4, SDO5
RPB2R, RPB6R, RPB14R, RPC2R, RPD0R, RPD1R, RPD5R, RPE8R, RPF2R, RPF3R, RPF13R, RPG9R	SDO4, SDO6
RPA14R, RPB5R, RPB9R, RPB10R, RPC1R, RPC14R, RPD2R, RPD6R, RPD10R, RPD14R, RPF1R, RPF4R, RPG1R, RPG8R	SDO1, SDO2, SDO3, SDO5
RPB0R, RPB7R, RPB8R, RPB15R, RPC3R, RPD4R, RPD9R, RPD12R, RPE3R, RPE9R, RPF8R, RPF12R, RPG6R	SDO6

How to select SPI on MEB-II board

Here is a combined list of all pins available for SPI functions:

Pin	Signal	Pictail	Conflict on MEB-II board
RA14	SDI1, SDI3, SDI5, SDO1, SDO2, SDO3, SDO5	4	Touch screen serial clock
RA15	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4, SDO5	6	Touch screen serial data
RB0	SDO6	23	Camera LDO shutdown
RB1	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4, SDO5		Display horizontal sync
RB2	SDI6, SDO4, SDO6		Bluetooth regulator enable
RB3	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4, SDO5	10, 18	Wi-Fi serial data in
RB5	SDI1, SDI3, SDI5, SDO1, SDO2, SDO3, SDO5		microSD data1
RB6	SDI6, SDO4, SDO6		PGEC2, on-board ICSP programmer/debugger
RB7	SDO6		PGED2, on-board ICSP programmer/debugger
RB8	SDO6		EBI-SRAM address 10
RB9	SDI1, SDI3, SDI5, SDO1, SDO2, SDO3, SDO5		EBI-SRAM address 7
RB10	SDI1, SDI3, SDI5, SDO1, SDO2, SDO3, SDO5	21	Audio serial data in
RB14	SDI6, SDO4, SDO6	19, 20	Button S3 on SK, microSD card detect
RB15	SDO6	22	Camera input clock
RC1	SDI1, SDI3, SDI5, SDO1, SDO2, SDO3, SDO5		EBI-SRAM address 6
RC2	SDI6, SDO4, SDO6		EBI-SRAM address 12
RC3	SDO6		EBI-SRAM pixel clock
RC4	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4, SDO5		EBI-SRAM pixel clock
RC13	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4, SDO5		-- (free, pin 105) --
RC14	SDI1, SDI3, SDI5, SDO1, SDO2, SDO3, SDO5		Secondary oscillator
RD0	SDI6, SDO4, SDO6		Wi-Fi interrupt
RD1	SDI6, SDO4, SDO6	25	Audio bit clock
RD2	SDI1, SDI3, SDI5, SDO1, SDO2, SDO3, SDO5		EBI-SRAM/Display data 14
RD3	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4, SDO5		EBI-SRAM/Display data 15
RD4	SDO6		Camera pixel
RD5	SDI6, SDO4, SDO6		SQI memory chip select
RD6	SDI1, SDI3, SDI5, SDO1, SDO2, SDO3, SDO5		Ethernet ETXEN
RD7	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4, SDO5		microSD command
RD9	SDO6		EBI-SRAM address 15
RD10	SDI1, SDI3, SDI5, SDO1, SDO2, SDO3, SDO5	12, 16	Wi-Fi serial clock
RD11	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4, SDO5		Ethernet EMDC
RD12	SDO6		EBI-SRAM/Display data 12
RD14	SDI1, SDI3, SDI5, SDO1, SDO2, SDO3, SDO5	15	Audio serial data output
RD15	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4, SDO5		Audio clock input
RE3	SDO6		EBI-SRAM/Display data 3
RE5	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4, SDO5		EBI-SRAM/Display data 5
RE8	SDI6, SDO4, SDO6		Camera shutdown
RE9	SDO6	24	Wi-Fi chip select
RF0	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4, SDO5		EBI-SRAM/Display data 11
RF1	SDI1, SDI3, SDI5, SDO1, SDO2, SDO3, SDO5		EBI-SRAM/Display data 10
RF2	SDI6, SDO4, SDO6		Camera serial data
RF3	SDI6, SDO4, SDO6	13	USB signal USBID
RF4	SDI1, SDI3, SDI5, SDO1, SDO2, SDO3, SDO5		EBI-SRAM/Display address 9
RF5	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4, SDO5		EBI-SRAM/Display address 8
RF8	SDO6		Camera serial clock
RF12	SDO6	14, 27	Audio left-right clock
RF13	SDI6, SDO4, SDO6		Display backlight enable
RG0	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4, SDO5		EBI-SRAM/Display data 8
RG1	SDI1, SDI3, SDI5, SDO1, SDO2, SDO3, SDO5		EBI-SRAM/Display data 9
RG6	SDO6	11	microSD clock
RG7	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4, SDO5	7, 8	Wi-Fi serial data out
RG8	SDI1, SDI3, SDI5, SDO1, SDO2, SDO3, SDO5	9	microSD data 0
RG9	SDI6, SDO4, SDO6		EBI-SRAM address 2

How to select SPI on SDZL board

PIC32MZ in 64-pin package has only SPI1-SPI4 ports available.

Signal	PIC32	Function	Other
0	RF4	SDI1, SDI3, SDO1, SDO2, SDO3	SDA5
1	RF5	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4	SCL5
3	RD10	SDI1, SDI3, SDO1, SDO2, SDO3	SCK4, SCL1
4	RD11	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4
5	RD0	SDO4
6	RC13	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4	SOSCI
7	RC14	SDI1, SDI3, SDO1, SDO2, SDO3	SOSCO
8	RD1	SDO4	SCK1
9	RD2	SDI1, SDI3, SDO1, SDO2, SDO3	SDA3
10	RD3	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4	SCL3
12	RD5	SDO4
13	RB5	SDI1, SDI3, SDO1, SDO2, SDO3	PROG button
14	RF0	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4
15	RF1	SDI1, SDI3, SDO1, SDO2, SDO3
21	RE5	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4
25	RG7	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4	SD_DI
26	RG8	SDI1, SDI3, SDO1, SDO2, SDO3	SD_DO
27	RG9	SDO4	SD_CS
A1	RB14	SDO4	SCK3
A5	RB10	SDI1, SDI3, SDO1, SDO2, SDO3	TMS
A6	RB9	SDI1, SDI3, SDO1, SDO2, SDO3
A8	RB6	SDO4	PGEC2
A11	RB1	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4	PGEC1
A12	RB2	SDO4
A13	RB3	SDI2, SDI4, SDO1, SDO2, SDO3, SDO4

SD card is attached to port SPI2, so if we don't want to interfere, we have the following choice:

Signal	PIC32	SPI1	SPI3	SPI4	Other
0	RF4	SDI1, SDO1	SDI3, SDO3		SDA5
1	RF5	SDO1	SDO3	SDI4, SDO4	SCL5
3	RD10	SDI1, SDO1	SDI3, SDO3	SCK4	SCL1
4	RD11	SDO1	SDO3	SDI4, SDO4
5	RD0			SDO4
6	RC13	SDO1	SDO3	SDI4, SDO4	SOSCI
7	RC14	SDI1, SDO1	SDI3, SDO3		SOSCO
8	RD1	SCK1		SDO4
9	RD2	SDI1, SDO1	SDI3, SDO3		SDA3
10	RD3	SDO1	SDO3	SDI4, SDO4	SCL3
12	RD5			SDO4
13	RB5	SDI1, SDO1	SDI3, SDO3		PROG button
14	RF0	SDO1	SDO3	SDI4, SDO4
15	RF1	SDI1, SDO1	SDI3, SDO3
21	RE5	SDO1	SDO3	SDI4, SDO4
A1	RB14		SCK3	SDO4
A5	RB10	SDI1, SDO1	SDI3, SDO3		TMS
A6	RB9	SDI1, SDO1	SDI3, SDO3
A8	RB6			SDO4	PGEC2
A11	RB1	SDO1	SDO3	SDI4, SDO4	PGEC1
A12	RB2			SDO4
A13	RB3	SDO1	SDO3	SDI4, SDO4