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LPC47M172_07 Datasheet

  • LPC47M172_07

  • SMSC Corporation [Advanced I/O Controller with Motherboard ...

  • SMSC   SMSC

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Advanced I/O Controller with Motherboard GLUE Logic
Datasheet
FORMAT FIELDS
SYSTEM 34 (DOUBLE DENSITY) FORMAT
GAP4a
80x
4E
SYNC
12x
00
IAM
GAP1 SYNC
50x
12x
4E
00
IDAM
C
Y
L
H
D
S N C GAP2 SYNC
E O R
22x
12x
C
C
4E
00
DATA
AM
C
DATA R GAP3 GAP 4b
C
3x FC
C2
3x FE
A1
3x FB
A1 F8
SYSTEM 3740 (SINGLE DENSITY) FORMAT
GAP4a
40x
FF
SYNC
6x
00
IAM
GAP1 SYNC
26x
6x
FF
00
IDAM
C
Y
L
H
D
S N C GAP2 SYNC
11x
6x
E O R
C
FF
00
C
DATA
AM
C
DATA R GAP3 GAP 4b
C
FC
FE
FB or
F8
PERPENDICULAR FORMAT
GAP4a
80x
4E
SYNC
12x
00
IAM
GAP1 SYNC
50x
12x
4E
00
IDAM
C
Y
L
H
D
S N C GAP2 SYNC
E O R
41x
12x
C
C
4E
00
DATA
AM
C
DATA R GAP3 GAP 4b
C
3x FC
C2
3x FE
A1
3x FB
A1 F8
Table 6.24 - Typical Values for Formatting
SECTOR SIZE N
SC GPL1 GPL2
128
00 12
07
09
128
00 10
10
19
512
02 08
18
30
46
87
FM
1024
03 04
2048
04 02
C8
FF
5.25鈥?Drives
C8
FF
4096
05 01
...
...
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鈥?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.
FORMAT
SMSC/Non-SMSC Register Sets (Rev.
01-11-07)
Page 67
SMSC LPC47M172
DATASHEET

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