20.6.2 Configuration
When the Always-On bit in the Control A register (CTRLA.ALWAYSON) is
‘1’, this register will be read-only.
| Name: | CONFIG |
| Offset: | 0x01 |
| Reset: | 0xXX |
| Property: | PAC Write-Protection |
The Reset value is determined from the Boot Configuration Fuses (BOOTCFG).
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| WINDOW[3:0] | PER[3:0] | ||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | x | x | x | x | x | x | x | x | |
Bits 7:4 – WINDOW[3:0] Window Mode Time-Out Period
In Window mode, this bit field controls the WDT closed window period as a number of cycles of the 1.024 kHz CLK_WDT_OSC clock.
This bit field is loaded from the BOOTCFG – Boot Configuration Fuses section at start-up.
| Value | Name | Description |
|---|---|---|
| 0x0 | CYC8 | 8 clock cycles |
| 0x1 | CYC16 | 16 clock cycles |
| 0x2 | CYC32 | 32 clock cycles |
| 0x3 | CYC64 | 64 clock cycles |
| 0x4 | CYC128 | 128 clock cycles |
| 0x5 | CYC256 | 256 clock cycles |
| 0x6 | CYC512 | 512 clock cycles |
| 0x7 | CYC1024 | 1024 clock cycles |
| 0x8 | CYC2048 | 2048 clock cycles |
| 0x9 | CYC4096 | 4096 clock cycles |
| 0xA | CYC8192 | 8192 clock cycles |
| 0xB | CYC16384 | 16384 clock cycles |
| Other | — | Reserved |
Bits 3:0 – PER[3:0] Time-Out Period
This bit field controls the WDT time-out period as a number of 1.024 kHz CLK_WDT_OSC clock cycles. In Window mode operation, this bit field defines the open window period.
This bit field is loaded from the BOOTCFG – Boot Configuration Fuses section at start-up.
| Value | Name | Description |
|---|---|---|
| 0x0 | CYC8 | 8 clock cycles |
| 0x1 | CYC16 | 16 clock cycles |
| 0x2 | CYC32 | 32 clock cycles |
| 0x3 | CYC64 | 64 clock cycles |
| 0x4 | CYC128 | 128 clock cycles |
| 0x5 | CYC256 | 256 clock cycles |
| 0x6 | CYC512 | 512 clock cycles |
| 0x7 | CYC1024 | 1024 clock cycles |
| 0x8 | CYC2048 | 2048 clock cycles |
| 0x9 | CYC4096 | 4096 clock cycles |
| 0xA | CYC8192 | 8192 clock cycles |
| 0xB | CYC16384 | 16384 clock cycles |
| Other | — | Reserved |