W83627SF-AW Winbond, W83627SF-AW Datasheet - Page 12

• Manufacturer Part Number: W83627SF-AW
• Manufacturer: Winbond

Specifications of W83627SF-AW

• Pin Count: 128
• Lead Free Status / RoHS Status: Not Compliant

4.2
DRVDEN0
DRVDEN1
SYMBOL
TRAK0#
INDEX#
IRQIN1
STEP#
MOA#
MOB#
DSB#
DSA#
GP27
SMI#
DIR#
WD#
WE#
WP#
FDC Interface
PIN
10
11
13
14
1
2
3
4
5
6
7
8
9
I/OD
OD
OD
OD
OD
OD
OD
OD
OD
OD
OD
OD
IN
IN
IN
I/O
IN
cs
cs
cs
24
12
12
24
24
24
24
24
24
24
24
t
12t
Drive Density Select bit 0.
Drive Density Select bit 1. (Default)
System Management Interrupt.
Interrupt channel input.
General purpose I/O port 2 bit 7.
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.
internally by a 1 K
bit 7 of L0-CRF0 (FIPURDWN).
Motor A On. When set to 0, this pin enables disk drive 0.
This is an open drain output.
Drive Select B. When set to 0, this pin enables disk drive B.
This is an open drain output.
Drive Select A. When set to 0, this pin enables disk drive A.
This is an open drain output.
Motor B On. When set to 0, this pin enables disk drive 1.
This is an open drain output.
Direction of the head step motor. An open drain output.
Logic 1 = outward motion
Logic 0 = inward motion
Step output pulses.
produces a pulse to move the head to another track.
Write data.
compensation serial data to the selected FDD.
drain output.
Write enable. An open drain output.
Track 0. This Schmitt-triggered input from the disk drive is
active low when the head is positioned over the outermost
track.
resistor. The resistor can be disabled by bit 7 of L0-CRF0
(FIPURDWN).
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
can be disabled by bit 7 of L0-CRF0 (FIPURDWN).
This input pin is pulled up internally by a 1 K 
-12-
This logic low open drain writes pre-

resistor. The resistor can be disabled by
This active low open drain output
FUNCTION
This input pin is pulled up

re
sistor. The resistor
W83627SF
An open