FDC37B72X View Datasheet(PDF) - SMSC -> Microchip

Part Name

Description

Manufacturer

FDC37B72X

128 Pin Enhanced Super I/O Controller with ACPI Support

SMSC -> Microchip 

BIT NO.

7

6

5

4

3

2

1

0

BIT NO.

7

6

5

4

3

2

1,0

SYMBOL

CM

DD

WC

BC

MD

TABLE 18 - STATUS REGISTER 2

NAME

DESCRIPTION

Unused. This bit is always "0".

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.

Data Error in The FDC detected a CRC error in the data field.

Data Field

Wrong

The track address from the sector ID field is different

Cylinder

from the track address maintained inside the FDC.

Unused. This bit is always "0".

Unused. This bit is always "0".

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.

Missing Data The FDC cannot detect a data address mark or a deleted

Address Mark data address mark.

SYMBOL

WP

T0

HD

DS1,0

TABLE 19 - STATUS REGISTER 3

NAME

DESCRIPTION

Unused. This bit is always "0".

Write

Indicates the status of the WP pin.

Protected

Unused. This bit is always "1".

Track 0

Indicates the status of the TRK0 pin.

Unused. This bit is always "1".

Head Address Indicates the status of the HDSEL pin.

Drive Select Indicates the status of the DS1, DS0 pins.

33

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