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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: 119/171頁
文件大小: 1634K
代理商: W83877AF
W83877AF
Publication Release Date: Dec. 1996
Preliminary Version 0.52
- 117 -
PEXTEPP (Bit 2):
This bit controls whether the PEXTEN pin is active in EPP mode.
0
PEXTEN is not active in EPP mode
1
PEXTEN is active in EPP mode
PEXTECP (Bit 1):
This bit controls whether the PEXTEN pin is active in ECP mode.
0
PEXTEN is not active in ECP mode
1
PEXTEN is active in ECP mode
PEXTECPP (Bit 0):
This bit controls whether the PEXTEN pin is active in ECP/EPP mode.
0
PEXTEN is not active in ECP/EPP mode
1
PEXTEN is active in ECP/EPP mode
8.2.12 Configuration Register B (CR0B), default = 0CH
When the device is in Extended Function mode and EFIR is 0BH, the CRB register can be accessed
through EFDR. The bit definitions are as follows:
1
2
3
4
5
6
7
0
DRV2EN
INVERTZ
MFM
IDENT
ENIFCHG
RXW4C
TXW4C
DSPRTPU
Bit 7: DSPRTPU
0
1
Enable parallel port pull-up resister.
Disable parallel port pull-up resister.
TXW4C (Bit 6):
This bit is active high. When active, the IR controller will wait for 4-character period of time from the
end of last receiving before it can start transmitting data.
RXW4C (Bit 5):
This bit is active high. When active, the IR controller will wait for 4-character period of time from the
end of last transmitting before it can start receiving data.
ENIFCHG (Bit 4):
This bit is active high. When active, it enables host interface mode change, which is determined by
IDENT (Bit 3) and MFM (Bit 2).
相關PDF資料
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