DPRESCALER

Debouncer Prescaler

  0x34 32 PAC Write-Protection, Enable-Protected, Secure 0x00000000  
Parent topic: Register Description

Debouncer Prescaler

Bit  31 30 29 28 27 26 25 24  
                   
Access                   
Reset                   
Bit  23 22 21 20 19 18 17 16  
                TICKON  
Access                RW/-/RW  
Reset                0  
Bit  15 14 13 12 11 10 9 8  
                   
Access                   
Reset                   
Bit  7 6 5 4 3 2 1 0  
          STATES PRESCALER[2:0]  
Access          RW/-/RW RW/-/RW RW/-/RW RW/-/RW  
Reset          0 0 0 0  

Bits 2:0 – PRESCALER[2:0]: Debouncer Prescaler

Debouncer Prescaler

These bits select the debouncer low frequency clock for pins EXTINT[7:0].
ValueNameDescription
0x0 F/2 EIC clock divided by 2
0x1 F/4 EIC clock divided by 4
0x2 F/8 EIC clock divided by 8
0x3 F/16 EIC clock divided by 16
0x4 F/32 EIC clock divided by 32
0x5 F/64 EIC clock divided by 64
0x6 F/128 EIC clock divided by 128
0x7 F/256 EIC clock divided by 256

Bit 3 – STATES: Debouncer Number of States

Debouncer Number of States

This bit selects the number of samples by the debouncer low frequency clock needed to validate a transition from current pin state to next pin state in synchronous debouncing mode for pins EXTINT[7:0].
ValueDescription
0 The number of low frequency samples is 3.
1 The number of low frequency samples is 7.

Bit 16 – TICKON: Pin Sampler frequency selection

Pin Sampler frequency selection

This bit selects the clock used for the sampling of bounce during transition detection.
ValueDescription
0 The bounce sampler is using GCLK_EIC.
1 The bounce sampler is using the low frequency clock.