LPC47M192 View Datasheet(PDF) - SMSC -> Microchip
Part Name
Description
MFG CO.
'LPC47M192' PDF : 228 Pages View PDF
Table 24 contains typical values for gap fields which are dependent upon the size of the sector and the number of
sectors on each track. Actual values can vary due to drive electronics.
FORMAT FIELDS
SYSTEM 34 (DOUBLE DENSITY) FORMAT
DATA
GAP4a SYNC IAM GAP1 SYNC IDAM C H S N C GAP2 SYNC AM
C
80x 12x
50x 12x
Y D E O R 22x 12x
DATA R GAP3 GAP 4b
4E
00
4E 00
L
C
C 4E 00
C
3x FC
3x FE
3x FB
C2
A1
A1 F8
SYSTEM 3740 (SINGLE DENSITY) FORMAT
DATA
GAP4a SYNC IAM GAP1 SYNC IDAM C H S N C GAP2 SYNC AM
C
40x
6x
FF
00
26x 6x
FF 00
Y D E O R 11x 6x
L
C
C FF 00
DATA R GAP3 GAP 4b
C
FC
FE
FB or
F8
PERPENDICULAR FORMAT
DATA
GAP4a SYNC IAM GAP1 SYNC IDAM C H S N C GAP2 SYNC AM
C
80x 12x
50x 12x
Y D E O R 41x 12x
DATA R GAP3 GAP 4b
4E
00
4E 00
L
C
C 4E 00
C
3x FC
3x FE
3x FB
C2
A1
A1 F8
Table 24 – Typical Values for Formatting
FORMAT SECTOR SIZE N SC GPL1 GPL2
128
00 12 07
09
128
00 10 10
19
512
02 08 18
30
FM
1024
03 04 46
87
2048
04 02 C8
FF
5.25” Drives
4096
05 01 C8
FF
...
...
256
01 12 0A
0C
256
01 10 20
32
512*
02 09 2A
50
MFM
1024
03 04 80
F0
2048
04 02 C8
FF
4096
05 01 C8
FF
...
...
128
0 0F 07
1B
3.5” Drives
FM
256
1 09 0F
2A
512
2 05 1B
3A
256
1 0F 0E
36
MFM
512**
2 09 1B
54
1024
3 05 35
74
GPL1 = suggested GPL values in Read and Write commands to avoid splice point between data field and
ID field of contiguous sections.
GPL2 = suggested GPL value in Format A Track command.
*PC/AT values (typical)
**PS/2 values (typical). Applies with 1.0 MB and 2.0 MB drives.
Note: All values except sector size are in hex.
SMSC DS – LPC47M192
Page 58
DATASHEET
Rev. 03/30/05
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