19.5.1 Control A

Name: CTRLA
Offset: 0x00
Reset: From FUSE.WDTCFG
Property: Configuration Change Protection

Bit 76543210 
 WINDOW[3:0]PERIOD[3:0] 
Access R/WR/WR/WR/WR/WR/WR/WR/W 
Reset xxxxxxxx 

Bits 7:4 – WINDOW[3:0] Window

Writing a non-zero value to these bits enables the window mode, and selects the according duration of the closed period.

The bits are optionally lock protected:

  • If LOCK bit in WDT.STATUS is '1', all bits are change protected (Access = R)
  • If LOCK bit in WDT.STATUS is '0', all bits can be changed (Access = R/W)
ValueNameDescription
0x0OFF-
0x18CLK0.008s
0x216CLK0.016s
0x332CLK0.032s
0x464CLK0.064s
0x5128CLK0.128s
0x6256CLK0.256s
0x7512CLK0.512s
0x81KCLK1.0s
0x92KCLK2.0s
0xA4KCLK4.1s
0xB8KCLK8.2s
other-Reserved

Bits 3:0 – PERIOD[3:0] Period

Writing a non-zero value to this bit enables the WDT, and selects the according timeout period in normal mode. In window mode, these bits select the duration of the open window.

The bits are optionally lock protected:

  • If LOCK in WDT.STATUS is '1', all bits are change protected (Access = R)
  • If LOCK in WDT.STATUS is '0', all bits can be changed (Access = R/W)
ValueNameDescription
0x0OFF-
0x18CLK0.008s
0x216CLK0.016s
0x332CLK0.032s
0x464CLK0.064s
0x5128CLK0.128s
0x6256CLK0.256s
0x7512CLK0.512s
0x81KCLK1.0s
0x92KCLK2.0s
0xA4KCLK4.1s
0xB8KCLK8.2s
other-Reserved