w83977atg Winbond Electronics Corp America, w83977atg Datasheet - Page 159

• Manufacturer Part Number: w83977atg
• Description: W83877tf Plus Kbc, Gp I/o, Wake-up, Fir, Cir, Pb-free
• Manufacturer: Winbond Electronics Corp America

CRF1 (Reserved)
CRF2 (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 to count down. If the Bit2 and Bit 1 are set, any Mouse
Interrupt or Keyboard Interrupt will also cause reloading of the non-zero value to Watch Dog Counter
and count down. Reading this register can not access Watch Dog Timer Time-out value, but can
access the current value in Watch Dog Counter.
CRF3 (WDT_CTRL0, Default 0x00)
Watch Dog Timer Control Register #0
CRF4 (WDT_CTRL1, Default 0x00)
Watch Dog Timer Control Register #1
Bit 2 - 0
Bit 7 - 0
Bit 7 - 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit 7 - 4
Bit 3
= 1
= 0
: Reserved
= 0x00 Time-out Disable
= 0x01 Time-out occurs after 1 minute
= 0x02 Time-out occurs after 2 minutes
= 0x03 Time-out occurs after 3 minutes
= 0xFF Time-out occurs after 255 minutes
: Reserved
: When Time-out occurs, Enable or Disable Power LED with 1 Hz and 50% duty
cycle output.
= 1
= 0
: Mouse interrupt reset Enable or Disable
= 1
= 0
: Keyboard interrupt reset Enable or Disable
= 1
= 0
: Reserved.
: Reserved
: Enable the rising edge of Keyboard Reset(P20) to force Time-out event, R/W*
= 1
= 0
................................................
Debounce Filter Enabled
Debounce Filter Bypassed
Enable
Disable
Watch Dog Timer is reset upon a Mouse interrupt
Watch Dog Timer is not affected by Mouse interrupt
Watch Dog Timer is reset upon a Keyboard interrupt
Watch Dog Timer is not affected by Keyboard interrupt
Enable
Disable
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W83977ATF/W83977ATG
Publication Release Date: May 2006
Revision 0.6