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參數(shù)資料
型號: W83977CTF
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): 97/161頁
文件大小: 1530K
代理商: W83977CTF
W83977EF/ CTF
PRELIMINARY
Publication Release Date: March 1999
-88 -
Revision A1
7.2
Alternate I/O Functions
W83977EF/CTF provides several alternate functions which are divided among the GP I/O ports.
Table 7.2.1 shows their assignments. Polarity bit can also be set to alter their polarity.
Table 7.2.1
GP I/O PORT
ALTERNATE FUNCTION
GP10
Interrupt Steering
GP11
Interrupt Steering
GP12
Watch Dog Timer Output/IRRX input
GP13
Power LED output/IRTX output
GP14
General Purpose Address Decoder/Keyboard Inhibit(P17)
GP15
General Purpose Write Strobe/ 8042 P12
GP16
Watch Dog Timer Output
GP17
Power LED output
GP20
Keyboard Reset (8042 P20)
GP21
8042 P13
GP22
8042 P14
GP23
8042 P15
GP24
8042 P16
GP25
GATE A20 (8042 P21)
7.2.1 Interrupt Steering
GP10, and GP11can be programmed to map their own interrupt channels. The selection of IRQ
channel can be performed in configuration registers CR70 and CR72 of logical device 7 and logical
device 9. Each interrupt channel also has its own 1 ms debounce filter that is used to reject any noise
whose width is equal to or less than 1 ms.
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W83977EF 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND ISA I/O
W83977EF-AW 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND ISA I/O
W83977EF-PW 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O