FDC37N869TQFP Ver la hoja de datos (PDF) - SMSC -> Microchip

Número de pieza

componentes Descripción

Lista de partido

FDC37N869TQFP

5V and 3.3V Super I/O Controller with Infrared Support for Portable Applications

SMSC -> Microchip 

PS/2 Model 30 Interface Mode

Table 6 - SRA PS/2 Model 30 Mode

7

6

5

4

3

2

1

0

INT

DRQ STEP F/F TRK0 nHDSEL INDX

WP

nDIR

PENDING

RESET

0

CONDITION

0

0

N/A

1

N/A

N/A

1

nDIRECTION, Bit 0

Active low status indicating the direction of head movement. A logic “0” indicating inward direction a logic “1”

outward.

Write Protect, Bit 1

Active high status of the WRITE PROTECT disk interface input. A logic “1” indicating that the disk is write protected.

The nWRITE PROTECT bit also depends upon the state of the Force Write Protect bits in the Force FDD Status

Change configuration register (see section CR17 on page 109).

Index, Bit 2

Active high status of the INDEX disk interface input.

nHEAD SELECT, Bit 3

Active low status of the HDSEL disk interface input. A logic “0” selects side 1 and a logic “1” selects side 0.

Track, Bit 4

Active high status of the TRK0 disk interface input.

Step, Bit 5

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.

DMA Request, Bit 6

Active high status of the DRQ output pin. Interrupt Pending, Bit 7 Active high bit indicating the state of the Floppy

Disk Interrupt output.

SMSC DS – FDC37N869

Page 20

Rev. 11/09/2000

Share Link: