W83L517D_05 Datasheet, PDF (123/133 Pages) Winbond – LPC I/O for Notebook

W83L517D/W83L517D-F
CRF3 (PLED mode register. Default 0x00)
Bit 7 ~ 3 : Reserved .
Bit 2: select WDTO count mode.
= 0 second
= 1 minute
Bit 1 ~ 0: select PLED mode
= 00 Power LED pin is tri-stated.
= 01 Power LED pin is droved low.
= 10 Power LED pin is a 1Hz toggle pulse with 50 duty cycle.
= 11 Power LED pin is a 1/4Hz toggle pulse with 50 duty cycle.
CRF4 (Default 0x00)
Watch Dog Timer Time-out value. Writing a non-zero value to this register causes the counter to load
the value to Watch Dog Counter and start counting down. Reading this register returns current value
in Watch Dog Counter instead of Watch Dog Timer Time-out value.
Bit 7 - 0:
= 0x00 Time-out Disable
= 0x01 Time-out occurs after 1 second/minute
= 0x02 Time-out occurs after 2 second/minutes
= 0x03 Time-out occurs after 3 second/minutes
................................................
= 0xFF Time-out occurs after 255 second/minutes
CRF5 (Default 0x00)
Bit 7 ~ 6 : Reserved .
Bit 5: Force Watch Dog Timer Time-out, Write only*
= 1 Force Watch Dog Timer time-out event; this bit is self-clearing.
Bit 4: Watch Dog Timer Status, R/W
= 1 Watch Dog Timer time-out occurred.
= 0 Watch Dog Timer counting
Bit 3 -0: These bits select IRQ resource for Watch Dog. Setting of 2 selects SMI.
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Publication Release Date: May 23, 2005
Revision 1.0