FDC37C672 Просмотр технического описания (PDF) - SMSC -> Microchip

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FDC37C672

Enhanced Super I/O Controller with Fast IR

SMSC -> Microchip 

Enhanced Super I/O Controller with Fast IR

Datasheet

PS/2 Model 30 Mode

7

6

5

4

3

2

1

0

INT

DRQ STEP TRK0 nHDSEL INDX WP nDIR

PENDING

F/F

RESET

0

0

0

N/A

1

N/A N/A

1

COND.

BIT 0 nDIRECTION

Active low status indicating the direction of head movement. A logic "0" indicates inward direction; a logic

"1" indicates outward direction.

BIT 1 WRITE PROTECT

Active high status of the WRITE PROTECT disk interface input. A logic "1" indicates 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.

SMSC FDC37C672

Page 20

DATASHEET

Rev. 10-29-03

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