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參數資料
型號: W83877TF
廠商: WINBOND ELECTRONICS CORP
元件分類: 外設及接口
英文描述: Multi-Function I/O Port Controller(用于個人計算機的多功能輸入/輸出口控制器)
中文描述: MULTIFUNCTION PERIPHERAL, PQFP100
封裝: QFP-100
文件頁數: 101/154頁
文件大?。?/td> 821K
代理商: W83877TF
W83877TF
Publication Release Date: March 1998
- 75 -
Version 0.61
Table 8-2
DO REGISTER ( 3F2H )
Bit 7
Bit 6
Bit 5
MOB
MOA
DSB
DSA
DRIVE
SELECTED
Bit 4
Bit 1
Bit 0
0
0
0
0
0
0
1
1
1
1
--
0
0
0
1
0
0
1
0
1
0
FDD A
0
0
1
0
0
1
0
1
0
1
FDD B
0
1
0
0
0
1
1
1
1
1
--
1
0
0
0
1
1
1
1
1
1
--
Table 8-3
DO REGISTER ( 3F2H )
Bit 7
Bit 6
Bit 5
MOB
MOA
DSB
DSA
DRIVE
SELECTED
Bit 4
Bit 1
Bit 0
0
0
0
0
X
X
1
1
x
x
--
0
0
0
1
0
0
0
0
0
0
FDD A
0
0
1
0
0
1
0
0
0
1
FDD B
0
1
0
0
1
0
0
0
1
0
FDD C
1
0
0
0
1
1
0
0
1
1
FDD D
FIPURDWN (Bit 4):
This bit controls the internal pull-up resistors of the FDC input pins RDATA, INDEX, TRAK0,
DSKCHG, and WP.
0
The internal pull-up resistors of FDC are turned on. (default)
1
The internal pull-up resistors of FDC are turned off.
FDCPWD (Bit 3):
This bit controls the power to the FDC.
0
Power is supplied to the FDC. (default)
1
Puts the FDC in power-down mode.
Bit 2: Reserved.
FDCTRI (Bit 1):
This bit enables or disables the tri-state outputs of the FDC in power-down mode.
0
The output pins of the FDC will not be tri-stated when FDC is in power-down mode.
1
The output pins of the FDC will be tri-stated when FDC is in power-down mode.
Bit 0: Reserved.
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