W83627F Information Storage Devices, Inc, W83627F Datasheet - Page 14

• Manufacturer Part Number: W83627F
• Description: LPC Interface I/o Plus Kbc, Game Port, Midi Port
• Manufacturer: Information Storage Devices, Inc

1.2 FDC Interface continued
DSB#
FANIN3
DSA#
MOB#
FANPWM3
DIR#
STEP#
WD#
WE#
TRACK0#
WP#
RDATA#
HEAD#
DSKCHG#
SYMBOL
5
6
7
8
9
10
11
13
14
15
16
17
PIN
OD
I/O
OD
OD
OD
OD
OD
OD
OD
IN
IN
IN
OD
IN
csu
csu
csu
csu
I/O
24ts
24
24
24
24
24
24
24
24
24
Drive Select B. When set to 0, this pin enables disk drive B. This
is an open drain output.
0V to +5V amplitude fan tachometer input
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.
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 active
low when the head is positioned over the outermost track. This
input pin is pulled up internally by a 1 K 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
disabled by bit 7 of L0-CRF0 (FIPURDWN).
The read data input signal from the FDD. This input pin is pulled up
internally by a 1 K
of L0-CRF0 (FIPURDWN).
Head select. This open drain output determines which d isk 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 is pulled up
internally by a 1 K
7 of L0-CRF0 (FIPURDWN).
- 10 -
resistor. The resistor can be disabled by bit 7
resistor. The resistor can be disabled by bit
FUNCTION
Publication Release Date:November 2002
resistor. The resistor can be
W83627HF/F
Revision 2.0