23.6.3 Early Warning Interrupt Control

Table 23-6. Register Bit Attribute Legend
SymbolDescriptionSymbolDescriptionSymbolDescription
RReadable bitHCCleared by Hardware(Grey cell)Unimplemented
WWritable bitHSSet by HardwareXBit is unknown at Reset
KWrite to clearSSoftware settable bit
Name: EWCTRL
Offset: 0x2
Reset: 0x0B
Property: RW

Bit 76543210 
     EWOFFSET[3:0] 
Access RWRWRWRW 
Reset 1011 

Bits 3:0 – EWOFFSET[3:0] Early Warning Interrupt Time Offset

These bits determine the number of GCLK_WDT clock cycles between the start of the watchdog time-out period and the generation of the Early Warning interrupt. These bits are loaded from User Configuration FUCFG0 at start-up.

ValueNameDescription
0x0CYC88 clock cycles
0x1CYC1616 clock cycles
0x2CYC3232 clock cycles
0x3CYC6464 clock cycles
0x4CYC128128 clock cycles
0x5CYC256256 clock cycles
0x6CYC512512 clock cycles
0x7CYC10241024 clock cycles
0x8CYC20482048 clock cycles
0x9CYC40964096 clock cycles
0xACYC81928192 clock cycles
0xBCYC1638416384 clock cycles