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參數(shù)資料
型號(hào): W83877AF
廠商: WINBOND ELECTRONICS CORP
元件分類: 外設(shè)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(shù): 45/171頁
文件大小: 1634K
代理商: W83877AF
W83877AF
Publication Release Date: Dec. 1996
Preliminary Version 0.52
- 43 -
NOPREC (Bit 2):
This bit indicates the value of CC REGISTER NOPREC bit.
DRATE1 DRATE0 (Bit 1, 0):
These two bits select the data rate of the FDC.
2.2.9 Configuration Control Register (CC Register) (Write base address + 7)
This register is used to control the data rate. In the PC/AT and PS/2 mode, the bit definitions are as
follows:
x
x
x
x
x
x
DRATE0
DRATE1
0
1
2
3
4
5
7
6
X: Reserved
Bit 7-2: Reserved. These bits should be set to 0.
DRATE1 DRATE0 (Bit 1, 0):
These two bits select the data rate of the FDC.
In the PS/2 Model 30 mode, the bit definitions are as follows:
1
2
3
4
5
6
7
0
DRATE0
DRATE1
NOPREC
X
X
X
X
X
X
:
Reserved
Bit 7-3: Reserved. These bits should be set to 0.
NOPREC (Bit 2):
This bit indicates no precompensation. It has no function and can be set by software.
DRATE1 DRATE0 (Bit 1, 0):
These two bits select the data rate of the FDC.
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