FDC37B78X View Datasheet(PDF) - SMSC -> Microchip
Part Name
Description
Manufacturer
FDC37B78X
SMSC -> Microchip
FDC37B78X Datasheet PDF : 258 Pages
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nonsequential sector addresses (interleaving).
This incrementing and formatting continues for
the whole track until the FDC encounters a pulse
on the IDX pin again and it terminates the
command.
TABLE 29 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
26x 6x
Y D E O R 11x 6x
DATA R GAP3 GAP 4b
FF
00
FF 00
L
C
C FF 00
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
62
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