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): 126/152頁
文件大?。?/td> 621K
代理商: FDC37C666GT
126
CR5
This register can only be accessed when the
FDC is in the Configuration Mode and the
CSR has been initialized to 05H. The default
value after power up is 00H.
Table 53 - CR5- Floppy Disk and IDE Extended Setup Register
BIT NAME
FDC Secondary
A low level on this bit selects the primary address for the FDC
interface (Default). A high level on this bit selects the secondary
address space.
IDE Secondary
A low level on this bit selects the primary address for the IDE
interface (Default). A high level on this bit selects the secondary
address space.
FDC DMA Mode
0=(default) Burst mode is enabled for the FDC FIFO execution
phase data transfers. 1=Non-Burst mode enabled. The FDRQ
and FIRQ pins are strobed once for each byte transferred while
the FIFO is enabled.
DenSel
Bit 4
Bit 3
Densel output
0
0
Normal (Default)
0
1
Reserved
1
0
1
1
1
0
swap drv 0,1
A high level on this bit, swaps drives and motor sel 0 and 1 of the
FDC. A low level on this bit does not (Default).
EXTx4
External 4 drive support: 0=Internal 4 drive decoder (default).
1=External 4 drive decoder (External 2 to 4 decoder required).
DS3
Set to 0 (default) - Pin 98 is DS2 if ECP is not enabled by the
configuration or PDIR if ECP is enabled.
Set to 1 - Pin 98 is DS3 regardless of the parallel port mode.
BIT NO.
0
DESCRIPTION
1
2
4,3
5
6
7
ADDRESS
3F0-3F7
370-377
1F0-1F7, 3F6,3F7
170-177, 376,377
BLOCK NAME
Floppy Disk
Floppy Disk
IDE
IDE
NOTES
Primary address
Secondary address
Primary address
Secondary address
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