參數(shù)資料
型號： FDC37C666GT
廠商： STANDARD MICROSYSTEMS CORP
元件分類： 存儲控制器/管理單元
英文描述： High-Performance Multi-Mode Parallel Port Super I/O Floppy Disk Controllers
中文描述： 1 Mbps, IDE COMPATIBLE, FLOPPY DISK DRIVE CONTROLLER, PQFP100
封裝： QFP-100
文件頁數(shù)： 38/152頁
文件大?。?/td> 621K
代理商： FDC37C666GT
38
CONFIGURATION CONTROL REGISTER (CCR)
Address 3F7 WRITE ONLY
PC/AT and PS/2 Modes
BIT 0 and 1 DATA RATE SELECT 0 and 1
These bits determine the data rate of the floppy
controller. See Table 13 for the appropriate
values.
BIT 2 - 7 RESERVED
Should be set to a logical "0"
PS/2 Model 30 Mode
BIT 0 and 1 DATA RATE SELECT 0 and 1
These bits determine the data rate of the floppy
controller. See Table 13 for the appropriate
values.
BIT 2 NO PRECOMPENSATION
This bit can be set by software, but it has no
functionality. It can be read by bit 2 of the DSR
when in Model 30 register mode. Unaffected by
software reset.
BIT 3 - 7 RESERVED
Should be set to a logical "0"
Table 16 shows the state of the DENSEL pin.
The DENSEL pin is set high after a hardware
reset and is unaffected by the DOR and the
DSR resets.
Table 16 - DENSEL Encoding
Data Rate
IDENT
1Mbps
7
6
5
4
3
2
1
0
DRATE
SEL1
1
DRATE
SEL0
0
RESET
COND.
N/A
N/A
N/A
N/A
N/A
N/A
7
6
5
4
3
2
1
0
NOPREC DRATE
SEL1
1
DRATE
SEL0
0
RESET
COND.
N/A
N/A
N/A
N/A
N/A
N/A
DENSEL
0
1
0
1
1
0
1
0
0
1
0
1
0
1
0
1
500kbps
300kps
250kbps
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