w83627ehf Winbond Electronics Corp America, w83627ehf Datasheet - Page 16

• Manufacturer Part Number: w83627ehf
• Description: W83627ehf/ef W83627ehg/eg Winbond Lpc I/o
• Manufacturer: Winbond Electronics Corp America

5.2
DRVDEN0
DSKCHG#
SYMBOL
RDATA#
TRAK0#
INDEX#
HEAD#
STEP#
MOA#
DSA#
DIR#
WD#
WE#
WP#
FDC Interface
PIN
10
11
13
14
15
16
17
1
3
4
6
8
9
OD
OD
OD
OD
OD
OD
OD
OD
IN
IN
IN
IN
IN
I/O
csu
csu
csu
csu
csu
24
24
24
24
24
24
24
24
Drive Density Select bit 0.
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 can be pulled up internally by a 1 K: D . The resistor
also can be disabled/enabled by bit 7 of LD0-CRF0(FIPURDWN). Default
is disabled.
Motor A On. When set to 0, this pin enables disk drive 0. 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.
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 active low
when the head is positioned over the outermost track. This input pin can
be pulled up internally by a 1 K: D  . The resistor also can be
disabled/enabled by bit 7 of LD0-CRF0(FIPURDWN). Default is disabled.
Write protected.
indicates that the diskette is write-protected. This input pin can be pulled
up internally by a 1 K: D . The resistor also can be disabled/enabled
by bit 7 of LD0-CRF0(FIPURDWN). Default is disabled.
The read data input signal from the FDD. This input pin can be pulled up
internally by a 1 K: D . The resistor also can be disabled/enabled by
bit 7 of LD0-CRF0(FIPURDWN). Default is disabled.
Head select. This open drain output determines which disk drive head is
active.
Logic 1 = side 0
Logic 0 = side 1
Diskette change. This signal is active low at power on and whenever the
diskette is removed. This input pin can be pulled up internally by a 1 K:
D . The resistor also can be disabled/enabled by bit 7 of LD0-CRF0
(FIPURDWN). Default is disabled.
W83627EHF/EF, W83627EHG/EG
This active low Schmitt input from the disk drive
-10-
FUNCTION