LPC47M140-NC SMSC [SMSC Corporation], LPC47M140-NC Datasheet - Page 42

• Manufacturer Part Number: LPC47M140-NC
• Description: 128 PIN ENGANCED SUPER I/O CONTROLLER WITH AN LPC INTERFACE AND USB HUB
• Manufacturer: SMSC [SMSC Corporation]

SMSC DS – LPC47M14X
SYMBOL
PRETRK
POLL
NCN
RCN
PCN
SRT
ST0
ST1
ST2
ST3
OW
MT
ND
SC
SK
N
R
Sectors Per Track
Step Rate Interval The time interval between step pulses issued by the FDC.
Sector Size Code This specifies the number of bytes in a sector. If this parameter is
Precompensation
Relative Cylinder
Present Cylinder
Non-DMA Mode
Sector Address
Polling Disable
New Cylinder
Multi-Track
Start Track
Number of
Overwrite
Skip Flag
Selector
Number
Number
Number
Number
Status 0
Status 1
Status 2
Status 3
NAME
Flag
When set, this flag selects the multi-track operating mode. In this
mode, the FDC treats a complete cylinder under head 0 and 1 as a
single track. The FDC operates as this expanded track started at the
first sector under head 0 and ended at the last sector under head 1.
With this flag set, a multitrack read or write operation will
automatically continue to the first sector under head 1 when the FDC
finishes operating on the last sector under head 0.
"00", then the sector size is 128 bytes.
transferred is determined by the DTL parameter. Otherwise the
sector size is (2 raised to the "Nth" 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
1024 Bytes
…
07 16K Bytes
The desired cylinder number.
Write ‘0’. This part does not support non-DMA mode.
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.
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 that store status information after a
command has been executed. This status information is available to
the host during the result phase after command execution.
128 Bytes
256 Bytes
512 Bytes
…
Page 42
DESCRIPTION
The number of bytes
Rev. 03/19/2001