Epson ETX-945 User Manual
Page 24
ETX-945 User Manual 1.02
www.diamondsystems.com
Page 24
4.3.5
Keyboard, mouse, and infrared transceiver interfaces
These pins carry data and
clock signals associated with the board’s PS2 keyboard and mouse ports. Additionally,
transmit and receive data to/from an IR device, can be routed as indicated.
Signal Name
Signal Function
Direction
KBDAT
Data to/from keyboard.
In/Out
KBCLK
Clock signal to keyboard
Out
MSDAT
Data to/from mouse
In/Out
MSCLK
Clock signal to mouse.
Out
IRTX
Infrared transmit data
Out
IRRX
Infrared receive data
In
4.3.6
Parallel port interface
These pins carry data and control information to/from
the board’s bidirectional parallel port, as indicated.
Signal Name
Signal Function
Direction
LPT/FLPY#
Interface configuration input
In
STB#
Printer data strobe
Out
AFD#
Automatic line feed request
Out
PD0-7
Bidirectional parallel data bus
In/Out
ERR#
Printer error
In
INIT#
Printer initialization control
Out
SLIN#
Printer select control
Out
ACK#
Printer ready to receive data
In
BUSY
Printer busy
In
PE
Printer out of paper
In
SLCT
Printer power on
In
Note: These pins are shared with the
board’s floppy drive controller function, under control of the
LPT/FLPY# input signal. When that signal is left unconnected or held high, the port is placed in
parallel-port mode.