參數(shù)資料
型號(hào): 37C669
廠商: SMSC Corporation
英文描述: DIODE SCHOTTKY SINGLE 25V 200mW 0.5V-vf 200mA-IFM 30mA-IF 2uA-IR SOD-323 3K/REEL
中文描述: 電腦98/99順從超級(jí)I / O軟盤(pán)控制器與紅外線支持
文件頁(yè)數(shù): 103/164頁(yè)
文件大?。?/td> 621K
代理商: 37C669
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43
Table 18 - Description of Command Symbols
SYMBOL
NAME
DESCRIPTION
N
Sector Size Code
This specifies the number of bytes in a sector. If this parameter is
"00", then the sector size is 128 bytes.
The number of bytes
transferred is determined by the DTL parameter. Otherwise the
sector size is (2 raised to the "N'th" power) times 128. All values
up to "07" hex are allowable. "07"h would equal a sector size of
16k. It is the user's responsibility to not select combinations that
are not possible with the drive.
N
SECTOR SIZE
00
128 bytes
01
256 bytes
02
512 bytes
03
1024 bytes
..
07
16 kbytes
NCN
New Cylinder
Number
The desired cylinder number.
ND
Non-DMA Mode
Flag
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.
OW
Overwrite
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.
PCN
Present Cylinder
Number
The current position of the head at the completion of Sense
Interrupt Status command.
POLL
Polling Disable
When set, the internal polling routine is disabled.
When clear,
polling is enabled.
PRETRK
Precompensation
Start Track
Number
Programmable from track 00 to FFH.
R
Sector Address
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.
RCN
Relative Cylinder
Number
Relative cylinder offset from present cylinder as used by the
Relative Seek command.
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