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FDC37C78-HT Datasheet(PDF) 24 Page - Microchip Technology

Part # FDC37C78-HT
Description  Floppy Disk Controller
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

FDC37C78-HT Datasheet(HTML) 24 Page - Microchip Technology

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24
Table 16 - Status Register 2
BIT NO.
SYMBOL
NAME
DESCRIPTION
7
Unused. This bit is always "0".
6
CM
Control Mark
Any one of the following:
1.
Read Data command - the FDC encountered a
deleted data address mark.
2.
Read Deleted Data command - the FDC
encountered a data address mark.
5
DD
Data Error in
Data Field
The FDC detected a CRC error in the data field.
4
WC
Wrong
Cylinder
The track address from the sector ID field is different
from the track address maintained inside the FDC.
3
Unused. This bit is always "0".
2
Unused. This bit is always "0".
1
BC
Bad Cylinder
The track address from the sector ID field is different
from the track address maintained inside the FDC and is
equal to FF hex, which indicates a bad track with a hard
error according to the IBM soft-sectored format.
0
MD
Missing Data
Address Mark
The FDC cannot detect a data address mark or a deleted
data address mark.


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