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參數(shù)資料
| 型號(hào)： | FDC37B77X |
| 廠商： | STANDARD MICROSYSTEMS CORP |
| 元件分類： | 外設(shè)及接口 |
| 英文描述： | 30 AMP MINIATURE POWER RELAY |
| 中文描述： | MULTIFUNCTION PERIPHERAL, PQFP100 |
| 封裝： | QFP-100 |
| 文件頁(yè)數(shù)： | 38/196頁(yè) |
| 文件大?。?/td> | 573K |
| 代理商： | FDC37B77X |
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38
Table 17 - Description of Command Symbols
SYMBOL
NCN
NAME
DESCRIPTION
New Cylinder
Number
Non-DMA Mode
Flag
The desired cylinder number.
ND
When set to 1, indicates that the FDC is to operate in the non-
DMA mode. In this mode, the host is interrupted for each data
transfer. When set to 0, the FDC operates in DMA mode,
interfacing to a DMA controller by means of the DRQ and nDACK
signals.
The bits D0-D3 of the Perpendicular Mode Command can only be
modified if OW is set to 1. OW id defined in the Lock command.
The current position of the head at the completion of Sense
Interrupt Status command.
When set, the internal polling routine is disabled. When clear,
polling is enabled.
Programmable from track 00 to FFH.
OW
Overwrite
PCN
Present Cylinder
Number
Polling Disable
POLL
PRETRK
Precompensation
Start Track
Number
Sector Address
R
The sector number to be read or written. In multi-sector transfers,
this parameter specifies the sector number of the first sector to be
read or written.
Relative cylinder offset from present cylinder as used by the
Relative Seek command.
The number of sectors per track to be initialized by the Format
command. The number of sectors per track to be verified during a
Verify command when EC is set.
When set to 1, sectors containing a deleted data address mark will
automatically be skipped during the execution of Read Data. If
Read Deleted is executed, only sectors with a deleted address
mark will be accessed. When set to "0", the sector is read or
written the same as the read and write commands.
Step Rate Interval The time interval between step pulses issued by the FDC.
Programmable from 0.5 to 8 milliseconds in increments of 0.5 ms
at the 1 Mbit data rate. Refer to the SPECIFY command for actual
delays.
Status 0
Status 1
Status 2
Status 3
RCN
Relative Cylinder
Number
Number of
Sectors Per Track
SC
SK
Skip Flag
SRT
ST0
ST1
ST2
ST3
Registers within the FDC which store status information after a
command has been executed. This status information is available
to the host during the result phase after command execution.
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| FDC37B782-NS | 功能描述:輸入/輸出控制器接口集成電路 Enhanced Super I/O Controller- Pb Free RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
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