33.12.13 Peripheral Multiplexing m

There are up to 16 Peripheral Multiplexing registers in each group, one for every set of two subsequent I/O lines. The m denotes the number of the set of I/O lines.

Table 33-18. Register Bit Attribute Legend
Symbol	Description	Symbol	Description	Symbol	Description
R	Readable bit	HC	Cleared by Hardware	(Grey cell)	Unimplemented
W	Writable bit	HS	Set by Hardware	X	Bit is unknown at Reset
K	Write to clear	S	Software settable bit	—	—

Name:	PMUXm
Offset:	0x30 + m*0x01 [m=0..15]
Reset:	0x00
Property:	PAC Write-Protection


Bit	7	6	5	4	3	2	1	0
	PMUXO[3:0]				PMUXE[3:0]
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset	0	0	0	0	0	0	0	0

Bits 7:4 – PMUXO[3:0] Peripheral Multiplexing for Odd-Numbered Pin

These bits select the peripheral function for odd-numbered pins (2*n + 1) of a PORT group, if the corresponding PINCFGn.PMUXEN bit is '1'.

Not all possible values for this selection may be valid. For more details, refer to the Pinout.

Table 33-21. Peripheral Port Mux Control Mapping
Port PINCFGn.MUXEN value	Port WRCONFIG.PMUX value	Peripheral Function	Description
0	N/A	Port	Normal Port I/O functions
1	0x0	EIC	External Interrupts
1	0x1	ADCN/ADC/AC	ADC and Analog Comparator
1	0x2	SERCOM	SERCOMn (UART, I²C, SPI)
1	0x3	SERCOM Alt	SERCOMn (UART, I²C, SPI)
1	0x4	EBI	External Bus Interface
1	0x5	TCC	Timer/Counter controller
1	0x6	TCC Alt/PDEC	Timer/Counter controller and Positional Decoder
1	0x7	COM/CM33 Trace	SQI/CAN/USB/CM33 Trace
1	0x8	SDMMC	SD/MMC Host Controller (Memory Card Interface)
1	0x9	SPI_IXS	SPI_IXS Audio
1	0xa	PCC	Parallel Capture Controller
1	0xb	ETH	Ethernet
1	0xc	MISC	GCLK/CCL/AC Alt
1	0xd	PTC Debug	Peripheral Touch Controller and JTAG/SWD Debug Interfaces

Bits 3:0 – PMUXE[3:0] Peripheral Multiplexing for Even-Numbered Pin

These bits select the peripheral function for even-numbered pins (2*n) of a PORT group, if the corresponding PINCFGn.PMUXEN bit is '1'.

Not all possible values for this selection may be valid. For more details, refer to the Pinout.

Table 33-19. Peripheral Port Mux Control Mapping
Port PINCFGn.MUXEN value	Port WRCONFIG.PMUX value	Peripheral Function	Description
0	N/A	Port	Normal Port I/O functions
1	0x0	EIC	External Interrupts
1	0x1	ADCN/ADC/AC	ADC and Analog Comparator
1	0x2	SERCOM	SERCOMn (UART, I²C, SPI)
1	0x3	SERCOM Alt	SERCOMn (UART, I²C, SPI)
1	0x4	EBI	External Bus Interface
1	0x5	TCC	Timer/Counter controller
1	0x6	TCC Alt/PDEC	Timer/Counter controller and Positional Decoder
1	0x7	COM/CM33 Trace	SQI/CAN/USB/CM33 Trace
1	0x8	SDMMC	SD/MMC Host Controller (Memory Card Interface)
1	0x9	SPI_IXS	SPI_IXS Audio
1	0xa	PCC	Parallel Capture Controller
1	0xb	ETH	Ethernet
1	0xc	MISC	GCLK/CCL/AC Alt
1	0xd	PTC Debug	Peripheral Touch Controller and JTAG/SWD Debug Interfaces

Table 33-20. Peripheral Port Mux Control Mapping for PIC32CK1012 Variant Only
Port PINCFGn.MUXEN value	Port WRCONFIG.PMUX value	Peripheral Function	Description
0	N/A	Port	Normal Port I/O functions
1	0x0	EIC	External Interrupts
1	0x1	ADCN/ADC/AC	ADC and Analog Comparator
1	0x2	SERCOM	SERCOMn (UART, I2C, SPI)
1	0x3	SERCOM Alt	SERCOMn (UART, I2C, SPI)
1	0x4	TCC	Timer/Counter controller
1	0x5	TCC Alt/PDEC	Timer/Counter controller and Positional Decoder
1	0x6	COM/CM33 Trace	SQI/CAN/USB/CM33 Trace
1	0x7	SDMMC	SD/MMC Host Controller (Memory Card Interface)
1	0x8	SPI_IXS	SPI_IXS Audio
1	0x9	PCC	Parallel Capture Controller
1	0xa	ETH	Ethernet
1	0xb	MISC	GCLK/CCL/AC Alt
1	0xc	PTC/DEBUG	Peripheral Touch Controller and JTAG/SWD Debug Interfaces
1	0xd	ETH Alt	Ethernet (48-pin variant only)
1	0xe	SQI Alt	Serial Quad Interface (48-pin variant only)