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參數(shù)資料
型號(hào): W83977TF
廠商: WINBOND ELECTRONICS CORP
英文描述: Multi-Function I/O Port Controller(用于個(gè)人計(jì)算機(jī)的多功能輸入/輸出口控制器)
中文描述: 多功能I / O端口控制器(用于個(gè)人計(jì)算機(jī)的多功能輸入/輸出口控制器)
文件頁數(shù): 121/160頁
文件大小: 1012K
代理商: W83977TF
W83977TF
PRELIMINARY
Publication Release Date: March 1998
-110-
Revision 0.62
TABLE C
WDT_CTRL1* BIT[1]*
WDT_CTRL0* BIT[3]
WDT_CTRL1 BIT[0] POWER LED STATE
1
X
X
1 Hertz Toggle pulse
0
0
X
Continuous high or low*
0
1
0
Continuous high or low*
0
1
1
1 Hertz Toggle pulse
*Note: 1). Regarding to the contents of WDT_CTR1 and WDT_CTRL0, please refer to CRF3 and CRF4 in Logic Device 8.
2). Continuous high or low depends on the polarity bit of GP13 or GP17 configure registers.
CRF1 ( Default 0x00)
General Purpose Read/Write Enable*
Bit 7 - 2: Reserved
Bit 1:
= 1 Enable General Purpose Write Strobe
= 0 Disable General Purpose Write Strobe
Bit 0:
= 1 Enable General Purpose Address Decode
= 0 Disable General Purpose Address Decode
*Note: If the logical device's activate bit is not set then bit 0 and 1 have no effect.
11.8 Logical Device 8 (GP I/O Port II)
CR30 (Default 0x00)
Bit 7 - 1: Reserved.
Bit 0: = 1 Activates the logical device.
= 0 Logical device is inactive.
CR60, CR 61 (Default 0x00, 0x00)
These two registers select GP2 & Watch Dog I/O base address [0x100:0xFFE] on 2 byte
boundary. I/O base address + 1: Watch Dog I/O base address.
CR70 (Default 0x00)
Bit 7 - 4: Reserved.
Bit 3 - 0: These bits select IRQ resource for Common IRQ of GP20~GP2
6
at Logic Device
8
.
CR72 (Default 0x00)
Bit 7 - 4: Reserved.
Bit 3 - 0: These bits select IRQ resource for Watch Dog.
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