w83977eg Winbond Electronics Corp America, w83977eg Datasheet - Page 103

• Manufacturer Part Number: w83977eg
• Description: Winbond Isa I/o W83977ef W83977eg
• Manufacturer: Winbond Electronics Corp America

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.
12.8 Logical Device 8 (GP I/O Port II)
CR30 (Default 0x00)
CR60, CR 61 (Default 0x00, 0x00)
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:
Bit 7 - 1: Reserved.
Bit 0: = 1 Activates the logical device.
These two registers select GP2 & Watch Dog I/O base address [0x100:0xFFE] on 2 byte
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 GP15 General Purpose Address Decode
= 0 Disable GP15 General Purpose Address Decode
= 1 Enable GP14 General Purpose Address Decode
= 0 Disable GP14 General Purpose Address Decode
= 0 Logical device is inactive.
boundary. I/O base address + 1: Watch Dog I/O base address.
1
0
0
0
WDT_CTRL0* BIT[3]
X
0
1
1
W83977EF-AW/W83977EG-AW
-101-
WDT_CTRL1 BIT[0]
X
X
0
1
Publication Release Date: Apr. 2006
1 Hertz Toggle pulse
Continuous high or low*
Continuous high or low*
1 Hertz Toggle pulse
POWER LED STATE
Revision 1.2