W83627G Просмотр технического описания (PDF) - Winbond

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W83627G

Winbond LPC I/O

Winbond 

W83627HF/ F/ HG/ G

6.2 FDC Interface

SYMBOL

PIN

I/O

FUNCTION

DRVDEN0

1

DRVDEN1

2

OD24

OD12

Drive Density Select bit 0.

Drive Density Select bit 1.（Default）

SMI#

OD12 System Management Interrupt

IRQIN1

INt Interrupt channel input.

GP27

I/OD12t General purpose I/O port 2 bit 7.

INDEX#

3

INcsu This Schmitt-triggered input from the disk drive is active low

when the head is positioned over the beginning of a track

marked by an index hole. This input pin is pulled up internally

by a 500 ohm resistor. The resistor can be disabled by bit 7 of

LD0-CRF0（FIPURDWN）.

MOA#

4

DSB#

5

FANIN3

DSA#

6

MOB#

7

FANPWM3

DIR#

8

STEP#

9

WD#

10

WE#

11

TRACK0#

13

OD24

OD24

I/O24ts

OD24

OD24

OD24

OD24

OD24

OD24

OD24

INcsu

Motor A On. When set to 0, this pin enables disk drive 0.

Drive Select B. When set to 0, this pin enables disk drive B.

0V to +5V amplitude fan tachometer input

Drive Select A. When set to 0, this pin enables disk drive A.

Motor B On. When set to 0, this pin enables disk drive 1.

Fan speed control. Use the Pulse Width Modulation（PWM）

technical knowledge to control the Fan's RPM.

Direction of the head step motor. An open drain output.

Logic 1 = outward motion

Logic 0 = inward motion

Step output pulses. This active low open drain output produces

a pulse to move the head to another track.

Write data. This logic low open drain writes pre-compensation

serial data to the selected FDD. An open drain output.

Write enable. An open drain output.

Track 0. This Schmitt-triggered input from the disk drive is ac-

tive low when the head is positioned over the outermost track.

This input pin is pulled up internally by a 1 K ohm resistor.The

resistor can be disabled by bit 7 of L0-CRF0（FIPURDWN）.

WP#

14

INcsu Write protected. This active low Schmitt input from the disk

drive indicates that the diskette is write-protected. This input pin

is pulled up internally by a 1 K ohm resistor. The resistor can

be disabled by bit 7 of L0-CRF0 （FIPURDWN）.

- 14 -

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