PMUX

Peripheral Multiplexing n

Important: For SAM L11 Non-Secure accesses, read and write accesses (RW*) are allowed only if the security attribution for the corresponding I/O pin is set as Non-Secured in the NONSEC register.
Tip: The I/O pins are assembled in pin groups (”PORT groups”) with up to 32 pins. Group 0 consists of the PA pins, group 1 is for the PB pins, etc. Each pin group has its own PORT registers, with a 0x80 address spacing. For example, the register address offset for the Data Direction (DIR) register for group 0 (PA00 to PA31) is 0x00, and the register address offset for the DIR register for group 1 (PB00 to PB31) is 0x80.

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

  0x30 + n*0x01 [n=0..15] 8 PAC Write-Protection, Mix-Secure 0x00 except PMUX15 = 0x06   16
Parent topic: Register Description

Peripheral Multiplexing n

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

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

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 PINCFGy.PMUXEN bit is '1'.

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

PMUXO[3:0] Name Description
0x0 A Peripheral function A selected
0x1 B Peripheral function B selected
0x2 C Peripheral function C selected
0x3 D Peripheral function D selected
0x4 E Peripheral function E selected
0x5 - Reserved
0x6 G Peripheral function G selected
0x7 H Peripheral function H selected
0x8 I Peripheral function I selected
0x9-0xF - Reserved

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

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 PINCFGy.PMUXEN bit is '1'.

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

PMUXE[3:0] Name Description
0x0 A Peripheral function A selected
0x1 B Peripheral function B selected
0x2 C Peripheral function C selected
0x3 D Peripheral function D selected
0x4 E Peripheral function E selected
0x5 - Reserved
0x6 G Peripheral function G selected
0x7 H Peripheral function H selected
0x8 I Peripheral function I selected
0x9-0xF - Reserved