FDC37M817-MS Standard Microsystems (SMSC), FDC37M817-MS Datasheet - Page 54
FDC37M817-MS
Manufacturer Part Number
FDC37M817-MS
Description
Manufacturer
Standard Microsystems (SMSC)
Datasheet
1.FDC37M817-MS.pdf
(198 pages)
Specifications of FDC37M817-MS
Pin Count
100
Lead Free Status / RoHS Status
Compliant
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before the head unloads, then the head settling
time may be saved between subsequent reads.
If the FDC detects a pulse on the nINDEX pin
twice without finding the specified sector (meaning
that the diskette's index hole passes through index
detect logic in the drive twice), the FDC sets the IC
code
in
MT
0
1
0
1
0
1
Status
N
1
1
2
2
3
3
256 x 26 = 6,656
256 x 52 = 13,312
512 x 15 = 7,680
512 x 30 = 15,360
1024 x 8 = 8,192
1024 x 16 = 16,384
MAXIMUM TRANSFER
Register
Table 20 - Effects of MT and N Bits
CAPACITY
0
54
to
ND bit in Status Register 1 to "1" indicating a
sector not found, and terminates the Read Data
Command.
After reading the ID and Data Fields in each
sector, the FDC checks the CRC bytes. If a CRC
error occurs in the ID or data field, the FDC sets
the IC code in Status Register 0 to "01" indicating
abnormal termination, sets the DE bit flag in Status
Register 1 to "1", sets the DD bit in Status Register
2 to "1" if CRC is incorrect in the ID field, and
terminates the Read Data Command. Table 21
describes the effect of the SK bit on the Read
Data command execution and results. Except
where noted in Table 21, the C or R value of the
sector address is automatically incremented (see
Table 23).
"01" indicating abnormal termination, sets the
26 at side 0 or 1
26 at side 1
15 at side 0 or 1
15 at side 1
8 at side 0 or 1
16 at side 1
FINAL SECTOR READ
FROM DISK
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