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參數(shù)資料
| 型號： | FDC37C665IR |
| 廠商： | SMSC Corporation |
| 英文描述： | 3/5 Volt Advanced High-Performance Multi-Mode Parallel Port Super I/O Floppy Disk Controller with Infranred Support |
| 中文描述： | 3 / 5伏先進的高性能多模并口超級I / O軟盤與Infranred支持磁盤控制器 |
| 文件頁數(shù)： | 44/162頁 |
| 文件大?。?/td> | 562K |
| 代理商： | FDC37C665IR |
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44
COMMAND SET/DESCRIPTIONS
Commands can be written whenever the FDC is
in the command phase. Each command has a
unique set of needed parameters and status
results. The FDC checks to see that the first
byte is a valid command and, if valid, proceeds
with the command. If it is invalid, an interrupt
is issued. The user sends a Sense Interrupt
Status command which returns an invalid
command error. Refer to Table 19 for
explanations of the various symbols used.
Table 20 lists the required parameters and the
results associated with each command that the
FDC is capable of performing.
Table 20 - Description of Command Symbols
NAME
Cylinder Address
The currently selected address; 0 to 255.
Data Pattern
The pattern to be written in each sector data field during
formatting.
Drive Select 0-3
Designates which drives are perpendicular drives on the
Perpendicular Mode Command. A "1" indicates a perpendicular
drive.
Direction Control
If this bit is 0, then the head will step out from the spindle during a
relative seek. If set to a 1, the head will step in toward the spindle.
Disk Drive Select
DS1 DS0 DRIVE
0 0 drive 0
0 1 drive 1
1 0 drive 2
1 1 drive 3
Special Sector
Size
of bytes transferred in disk read/write commands. The sector size
(N = 0) is set to 128. If the actual sector (on the diskette) is larger
than DTL, the remainder of the actual sector is read but is not
passed to the host during read commands; during write
commands, the remainder of the actual sector is written with all
zero bytes. The CRC check code is calculated with the actual
sector. When N is not zero, DTL has no meaning and should be
set to FF HEX.
Enable Count
When this bit is "1" the "DTL" parameter of the Verify command
becomes SC (number of sectors per track).
Enable FIFO
This active low bit when a 0, enables the FIFO. A "1" disables the
FIFO (default).
Enable Implied
Seek
read or write command that requires the C parameter in the
command phase. A "0" disables the implied seek.
End of Track
The final sector number of the current track.
Alters Gap 2 length when using Perpendicular Mode.
Gap Length
The Gap 3 size. (Gap 3 is the space between sectors excluding
the VCO synchronization field).
SYMBOL
C
D
DESCRIPTION
D0, D1, D2,
D3
DIR
DS0, DS1
DTL
By setting N to zero (00), DTL may be used to control the number
EC
EFIFO
EIS
When set, a seek operation will be performed before executing any
EOT
GAP
GPL
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PDF描述 |
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| FDC37C665GT | High-Performance Multi-Mode Parallel Port Super I/O Floppy Disk Controllers |
| FDC37C666GT | High-Performance Multi-Mode Parallel Port Super I/O Floppy Disk Controllers |
| FDC37C67X | ENHANCED SUPER I/O CONTROLLER WITH FAST IR |
| FDC37C957FR | ULTRA I/O CONTROLLER FOR PORTABLE APPLICATIONS |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FDC37C665IRQFP | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:SMSC 功能描述: |
| FDC37C666GT | 制造商:SMSC 制造商全稱:SMSC 功能描述:High-Performance Multi-Mode Parallel Port Super I/O Floppy Disk Controllers |
| FDC37C669 | 制造商:SMSC 制造商全稱:SMSC 功能描述:PC 98/99 Compliant Super I/O Floppy Disk Controller with Infrared Support |
| FDC37C669_07 | 制造商:SMSC 制造商全稱:SMSC 功能描述:PC 98/99 Compliant Super I/O Floppy Disk Controller with Infrared Support |
| FDC37C669FRQFP | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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