
W83627UHG
Publication Release Date: March 24, 2008
-9-
Revision 1.44
SYMBOL
PIN
I/O
DESCRIPTION
DTRE#
O
8
UART E Data Terminal Ready. An active-low signal informs the
modem or data set that the controller is ready to communicate.
GP54
128
I/OD
12t
General-purpose I/O port 5 bit 4.
DTRF#
O
24
UART F Data Terminal Ready. An active-low signal informs the
modem or data set that the controller is ready to communicate.
DIR#
9
OD
24
Direction of the head step motor. An open drain output.
Logic 1 = outward motion
Logic 0 = inward motion
SINA
53
IN
t
Serial Input. This pin is used to receive serial data through the
communication link.
SINB
Serial Input. This pin is used to receive serial data through the
communication link.
IRRX
IN
t
IR Receiver input.
GP13
82
I/OD
12t
General-purpose I/O port 1 bit 3.
SINC
IN
t
Serial Input. This pin is used to receive serial data through the
communication link.
GP33
113
I/OD
12t
General-purpose I/O port 3 bit 3.
SIND
IN
t
Serial Input. This pin is used to receive serial data through the
communication link.
GP43
121
I/OD
12t
General-purpose I/O port 4 bit 3.
SINE
IN
t
Serial Input. This pin is used to receive serial data through the
communication link.
GP53
1
I/OD
12t
General-purpose I/O port 5 bit 3.
SINF
IN
t
Serial Input. This pin is used to receive serial data through the
communication link.
STEP#
10
OD
24
Step output pulses. This active low open drain output produces a
pulse to move the head to another track.
SOUTA
O
8
UART A Serial Output. This pin is used to transmit serial data out
to the communication link.
PENKBC
54
INcd
During power on reset, this pin is pulled down internally and is
defined as PENKBC, and the power-on values are shown at
CR24 bit 2. The PCB layout should reserve space for a 1-k
Ω
resistor to pull down this pin to ensure the disabling of KBC, and
a 1-k
Ω resistor is recommended to pull the pin up If wish to
enable KBC.
SOUTB
UART B Serial Output. This pin is used to transmit serial data out
to the communication link.
IRTX
O
8
IR Transmitter output.
GP12
83
I/OD
8
General-purpose I/O port 1 bit 2.
SOUTC
114
O
8
UART C Serial Output. This pin is used to transmit serial data out
to the communication link.