FDC37C935-QS Standard Microsystems (SMSC), FDC37C935-QS Datasheet - Page 38

• Manufacturer Part Number: FDC37C935-QS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37C935-QS

• Lead Free Status / RoHS Status: Supplier Unconfirmed

N
NCN
ND
OW
PCN
POLL
PRETRK
R
RCN
SC
SYMBOL
Sector Size Code
New Cylinder
Number
Non-DMA Mode
Flag
Overwrite
Present Cylinder
Number
Polling Disable
Precompensation
Start Track
Number
Sector Address
Relative Cylinder
Number
Number of
Sectors Per Track
NAME
Table 19 - Description of Command Symbols
This specifies the number of bytes in a sector. If this parameter is
"00", then the sector size is 128 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.
The desired cylinder number.
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.
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.
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
When set to 0, the FDC operates in DMA mode,
38
07
N
00
01
02
03
..
SECTOR SIZE
16 Kbytes
DESCRIPTION
1024 bytes
128 bytes
256 bytes
512 bytes
...
The number of bytes