18.5.16 Pin n Control

Name: PINnCTRL
Offset: 0x10 + n*0x01 [n=0..7]
Reset: 0x00
Property: -

Bit 76543210 
 INVEN   PULLUPENISC[2:0] 
Access R/WR/WR/WR/WR/W 
Reset 00000 

Bit 7 – INVEN Inverted I/O Enable

This bit controls whether the input and output for pin n are inverted or not.
ValueDescription
0 Input and output values are not inverted
1 Input and output values are inverted

Bit 3 – PULLUPEN Pull-Up Enable

This bit controls whether the internal pull-up of pin n is enabled or not when the pin is configured as input-only.
ValueDescription
0 Pull-up disabled
1 Pull-up enabled

Bits 2:0 – ISC[2:0] Input/Sense Configuration

This bit field controls the input and sense configuration of pin n. The sense configuration determines the pin conditions that will trigger a port interrupt.

Note:
  1. If the digital input buffer for pin n is disabled, bit n in the Input Value (PORTx.IN) register will not be updated.
  2. The LEVEL interrupt will continue to trigger as long as the pin remains in a low state.
ValueNameDescription
0x0 INTDISABLE Interrupt disabled but digital input buffer enabled
0x1 BOTHEDGES Interrupt enabled with sense on both edges
0x2 RISING Interrupt enabled with sense on rising edge
0x3 FALLING Interrupt enabled with sense on falling edge
0x4 INPUT_DISABLE Interrupt and digital input buffer disabled(1)
0x5 LEVEL Interrupt enabled with sense on low level(2)
other — Reserved