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參數資料
型號: W83877AF
廠商: WINBOND ELECTRONICS CORP
元件分類: 外設及接口
英文描述: Multi-Function I/O Port Controller(多功能輸入/輸出口控制器)
中文描述: MULTIFUNCTION PERIPHERAL, PQFP100
封裝: QFP-100
文件頁數: 118/171頁
文件大小: 1634K
代理商: W83877AF
W83877AF
Publication Release Date: Dec. 1996
Preliminary Version 0.52
- 116 -
These four bits are read-only bits that contain chip identification information. The value is 0BH for
W83877AF during a read.
8.2.11 Configuration Register A (CRA), default = 1FH
When the device is in Extended Function mode and EFIR is 0AH, the CRA register can be accessed
through EFDR. The bit definitions are as follows:
7 6 5 4 3 2 1 0
PEXTECPP
PEXT ECP
PEXT EPP
PEXT ADP
PDCACT
PDIRHOP
PEXT ACT
PFDCACT
PFDCACT (Bit 7):
This bit controls whether PFDCEN (pin 41) is active high or low in portable mode.
0
PFDCEN is active low
1
PFDCEN is active high
PEXTACT (Bit 6):
This bit controls whether PEXTEN (pin 39) is active high or low in portable mode. This pin can also
reflect the mode of the parallel port: EXTADP mode, EPP mode, ECP mode, or ECP/EPP mode, or
any combination of these modes.
0
PEXTEN is active low
1
PEXTEN is active high
Bit 5: Reserved.
PDCACT (Bit 4):
This bit controls whether the PDCIN pin is active high or low.
0
PDCIN is active low
1
PDCIN is active high
PEXTADP (Bit 3):
This bit controls whether the PEXTEN pin is active in EXTADP mode.
0
PEXTEN is not active in EXTADP mode
1
PEXTEN is active in EXTADP mode
相關PDF資料
PDF描述
W83877ATD enhanced version from Winbonds most popular I/O chip W83877F
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相關代理商/技術參數
參數描述
W83877ATD 制造商:WINBOND 制造商全稱:Winbond 功能描述:enhanced version from Winbonds most popular I/O chip W83877F
W83877ATF 制造商:WINBOND 制造商全稱:Winbond 功能描述:enhanced version from Winbonds most popular I/O chip W83877F
W83877F 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O
W83877TD 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O
W83877TF 制造商:WINBOND 制造商全稱:Winbond 功能描述:WINBOND I/O