FDC37N769_07 SMSC [SMSC Corporation], FDC37N769_07 Datasheet - Page 35

• Manufacturer Part Number: FDC37N769_07
• Description: 3.3V Super I/O Controller with Infrared Support for Portable Applications
• Manufacturer: SMSC [SMSC Corporation]

SMSC DS – FDC37N769
SYMBOL
PRETRK
WGATE
POLL
NCN
RCN
PCN
SRT
ST0
ST1
ST2
ST3
OW
ND
SC
SK
N
R
Overwrite
Polling Disable
Precompensation
Sector Size Code
New Cylinder
Number
Non-DMA Mode
Flag
Present Cylinder
Number
Start Track
Number
Sector Address
Relative Cylinder
Number
Number of
Sectors Per Track
Skip Flag
Step Rate Interval
Status 0
Status 1
Status 2
Status 3
Write Gate
NAME
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.
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.
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.
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.
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.
Alters timing of WE to allow for pre-erase loads in perpendicular
drives.
DATASHEET
00
01
02
07
...
N
Page 35 of 137
SECTOR SIZE
16Kbytes
128bytes
256bytes
512bytes
...
DESCRIPTION
The number of bytes
Rev. 02-16-07