CTRLB

Control B in COUNT32 mode (CTRLA.MODE=0)

  0x02 16 PAC Write-Protection, Enable-Protected 0x0000    
Parent topic: Register Description - Mode 0 - 32-Bit Counter

Control B in COUNT32 mode (CTRLA.MODE=0)

Bit  15 14 13 12 11 10 9 8  
  SEPTO ACTF[2:0]   DEBF[2:0]  
Access  R/W R/W R/W R/W   R/W R/W R/W  
Reset  0 0 0 0   0 0 0  
Bit  7 6 5 4 3 2 1 0  
  DMAEN RTCOUT DEBASYNC DEBMAJ       GP0EN  
Access  R/W R/W R/W R/W       R/W  
Reset  0 0 0 0       0  

Bit 15 – SEPTO: Separate Tamper Outputs

Separate Tamper Outputs

ValueDescription
0 IN[n] is compared to OUT[0].
1 IN[n] is compared to OUT[n].

Bits 14:12 – ACTF[2:0]: Active Layer Frequency

Active Layer Frequency

These bits define the prescaling factor for the RTC clock output (OUT) used during active layer protection in terms of the CLK_RTC.
ValueNameDescription
0x0 DIV2 CLK_RTC_OUT = CLK_RTC / 2
0x1 DIV4 CLK_RTC_OUT = CLK_RTC / 4
0x2 DIV8 CLK_RTC_OUT = CLK_RTC / 8
0x3 DIV16 CLK_RTC_OUT = CLK_RTC / 16
0x4 DIV32 CLK_RTC_OUT = CLK_RTC / 32
0x5 DIV64 CLK_RTC_OUT = CLK_RTC / 64
0x6 DIV128 CLK_RTC_OUT = CLK_RTC / 128
0x7 DIV256 CLK_RTC_OUT = CLK_RTC / 256

Bits 10:8 – DEBF[2:0]: Debounce Frequency

Debounce Frequency

These bits define the prescaling factor for the input debouncers in terms of the CLK_RTC.
ValueNameDescription
0x0 DIV2 CLK_RTC_DEB = CLK_RTC / 2
0x1 DIV4 CLK_RTC_DEB = CLK_RTC / 4
0x2 DIV8 CLK_RTC_DEB = CLK_RTC / 8
0x3 DIV16 CLK_RTC_DEB = CLK_RTC / 16
0x4 DIV32 CLK_RTC_DEB = CLK_RTC / 32
0x5 DIV64 CLK_RTC_DEB = CLK_RTC / 64
0x6 DIV128 CLK_RTC_DEB = CLK_RTC / 128
0x7 DIV256 CLK_RTC_DEB = CLK_RTC / 256

Bit 7 – DMAEN: DMA Enable

DMA Enable

The RTC can trigger a DMA request when the timestamp is ready in the TIMESTAMP register.
ValueDescription
0 Tamper DMA request is disabled. Reading TIMESTAMP has no effect on INTFLAG.TAMPER.
1 Tamper DMA request is enabled. Reading TIMESTAMP will clear INTFLAG.TAMPER.

Bit 6 – RTCOUT: RTC Output Enable

RTC Output Enable

ValueDescription
0 The RTC active layer output is disabled.
1 The RTC active layer output is enabled.

Bit 5 – DEBASYNC: Debouncer Asynchronous Enable

Debouncer Asynchronous Enable

ValueDescription
0 The tamper input debouncers operate synchronously.
1 The tamper input debouncers operate asynchronously.

Bit 4 – DEBMAJ: Debouncer Majority Enable

Debouncer Majority Enable

ValueDescription
0 The tamper input debouncers match three equal values.
1 The tamper input debouncers match majority two of three values.

Bit 0 – GP0EN: General Purpose 0 Enable

General Purpose 0 Enable

ValueDescription
0 COMP0 compare function enabled. GP0/GP1 disabled.
1 COMP0 compare function disabled. GP0/GP1 enabled.