W83977EF Winbond Electronics Corp America, W83977EF Datasheet - Page 111

• Manufacturer Part Number: W83977EF
• Description: Description = W83877TF Plus Kbc, GP I/O, Wake-Up, Power Fail Resume ;; Package = QFP 128
• Manufacturer: Winbond Electronics Corp America

*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.
10.8 Logical Device 8 (GP I/O Port II)
CR30 (Default 0x00)
CR60, CR 61 (Default 0x00, 0x00)
CR70 (Default 0x00)
CR72 (Default 0x00)
CRE8 (GP20, Default 0x01)
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
Bit 7 - 4: Reserved.
Bit 3 - 0: These bits select IRQ resource for Common IRQ of GP20~GP26 at Logic Device 8.
Bit 7 - 4: Reserved.
Bit 3 - 0: These bits select IRQ resource for Watch Dog.
Bit 7 - 5: Reserved.
Bit 4 - 3: Select Function.
2). Continuous high or low depends on the polarity bit of GP13 or GP17 configure registers.
= 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.
= 00 Select basic I/O function
= 01 Reserved
= 10 Select alternate function: Keyboard Reset (connected to KBC P20)
0
0
1
1
-105 -
0
1
Publication Release Date: April 2003
Continuous high or low*
1 Hertz Toggle pulse
W83977EF
Revision 1.1