NCT6627UD Nuvoton Technology Corporation of America, NCT6627UD Datasheet - Page 19

• Manufacturer Part Number: NCT6627UD
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of NCT6627UD

• Lead Free Status / Rohs Status: Supplier Unconfirmed

SYMBOL
RDATA#
TRAK0#
SOUTF
DCDF#
HEAD#
DTRF#
STEP#
GP63
GP62
GP61
DIR#
SINF
WD#
WE#
WP#
RIF#
PIN
10
11
13
14
15
16
17
9
I/OD
I/OD
I/OD
OD
OD
OD
OD
OD
IN
IN
IN
O
O
I/O
IN
IN
IN
24
24
tsu
tsu
tsu
24
24
t
24
24
t
12ts
12ts
24
t
12ts
Direction of the head step motor. An open-drain output.
Logic 1 = outward motion
Logic 0 = inward motion
UART F Data Terminal Ready. An active low signal informs the
modem or data set that the controller is ready to communicate.
Step output pulses. This active-low open-drain output produces
a pulse to move the head to another track.
Serial Input. This pin is used to receive serial data through the
communication link.
Write data. This logic-low open-drain writes pre-compensation
serial data to the selected FDD. An open-drain output.
UART F Serial Output. This pin is used to transmit serial data
out to the communication link.
Write enable. An open-drain output.
Data Carrier Detect. An active low signal indicates the modem
or data set has detected a data carrier.
Track 0. This Schmitt-trigger input from the disk drive is active-
low when the head is positioned over the outermost track. This
input pin needs to connect a pulled-up 1-KΩ resistor to 5V for
Floppy Drive compatibility.
General purpose I/O port 6 bit 3.
Write Protected. This active-low Schmitt input from the disk
drive indicates that the diskette is write-protected. This input pin
needs to connect a pulled-up 1-KΩ resistor to 5V for Floppy
Drive compatibility.
General purpose I/O port 6 bit 2.
The read-data input signal from the FDD. This input pin needs to
connect a pulled-up 1-KΩ resistor to 5V for Floppy Drive
compatibility.
General purpose I/O port 6 bit 1.
Head Select.
drive head is active.
Logic 1 = side 0
Logic 0 = side 1
Ring Indicator. An active low signal indicates that a ring signal
is being received from the modem or data set.
This open-drain output determines which disk
DESCRIPTION
-10-
W83627UHG/NCT6627UD
Publication Release Date: October 26, 2010
Revision 1.7