W83977AF Information Storage Devices, Inc, W83977AF Datasheet - Page 149

• Manufacturer Part Number: W83977AF
• Description: W83877TF Plus Kbc, Cir, RTC
• Manufacturer: Information Storage Devices, Inc

CRE7 (GP17, Default 0x01)
TABLE C
*Note: 1). Regarding to the contents of WDT_CTR1 and WDT_CTRL0, please refer to CRF3 and CRF4 in Logic Device 8.
CRF1 ( Default 0x00)
*Note : If the logical device s activate bit is not set then bit 0 and 1 have no effect.
WDT_CTRL1* BIT[1]*
Bit 7-4 : Reserved.
Bit 4-3 : Select Function.
Bit 2 : Reserved.
Bit 1 : Polarity : 1 : Invert, 0 : No Invert
Bit 0 : In/Out : 1 : Input, 0 : Output
General Purpose Read/Write Enable*
Bit 7-2 : Reserved
Bit 1 :
Bit 0 :
2). Continuous high or low depends on the polarity bit of GP13 or GP17 configure registers.
= 00 Select Basic I/O function.
= 01 Select 1st alternate function : Power LED output. Please refer to TABLE C
= 1x Reserved
= 1 Enable General Purpose Write Strobe
= 0 Disable General Purpose Write Strobe
= 1 Enable General Purpose Address Decode
= 0 Disable General Purpose Address Decode
1
0
0
0
WDT_CTRL0* BIT[3]
X
0
1
1
- 137 -
WDT_CTRL1 BIT[0]
W83977F/ W83977AF
X
X
0
1
Publication Release Date: March 1998
1 Hertz Toggle pulse
Continuous high or low*
Continuous high or low*
1 Hertz Toggle pulse
POWER LED STATE
PRELIMINARY
Revision 0.58