FDC37C665GT(1994) Ver la hoja de datos (PDF) - SMSC -> Microchip

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FDC37C665GT
(Rev.:1994)

High-Performance Multi-Mode Parallel Port Super I/O Floppy Disk Controllers

SMSC -> Microchip 

PS/2 Model 30 Mode

RESET

COND.

7

INT

PENDING

0

6

DRQ

0

5

STEP

F/F

0

4

TRK0

N/A

3

nHDSEL

1

2

INDX

N/A

1

0

WP nDIR

N/A 1

BIT 0 nDIRECTION

Active low status indicating the direction of head

movement. A logic "0" indicating inward

direction a logic "1" outward.

BIT 1 WRITE PROTECT

Active high status of the WRITE PROTECT disk

interface input. A logic "1" indicating that the

disk is write protected.

BIT 2 INDEX

Active high status of the INDEX disk interface

input.

BIT 3 nHEAD SELECT

Active low status of the HDSEL disk interface

input. A logic "0" selects side 1 and a logic "1"

selects side 0.

BIT 4 TRACK 0

Active high status of the TRK0 disk interface

input.

BIT 5 STEP

Active high status of the latched STEP disk

interface output pin. This bit is latched with the

STEP output going active, and is cleared with a

read from the DIR register, or with a hardware

or software reset.

BIT 6 DMA REQUEST

Active high status of the DRQ output pin.

BIT 7 INTERRUPT PENDING

Active high bit indicating the state of the Floppy

Disk Interrupt output.

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