LPC47M172_07 SMSC [SMSC Corporation], LPC47M172_07 Datasheet - Page 55

• Manufacturer Part Number: LPC47M172_07
• Description: Advanced I/O Controller with Motherboard GLUE Logic
• Manufacturer: SMSC [SMSC Corporation]

SMSC/Non-SMSC Register Sets (Rev. 01-11-07)
SYMBOL
PRETRK
WGATE
POLL
NCN
PCN
RCN
SRT
ST0
ST1
ST2
ST3
OW
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
Start Track
Write Gate
Number of
Overwrite
Skip Flag
Status 0
Status 1
Status 2
Status 3
Number
Number
Number
Number
NAME
Flag
"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
00
01
02
03
…
07
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 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
SECTOR SIZE
128 Bytes
256 Bytes
512 Bytes
1024 Bytes
16K Bytes
…
Page 55
DESCRIPTION
Advanced I/O Controller with Motherboard GLUE Logic
SMSC LPC47M172
Datasheet