Serial Communication - Casio IT-2000W Technical Reference Manual

2.3.5 Serial Communication

Available Interfaces
Port I/O Address
COM1 3F8h-3FFh
COM2 2F8h-2FFh
COM3 3E8h-3EFh
COM4 2E8h-2EFh
COM1
This is a COM port for RS-232C communication. This port can be used after turning on the power to
the 8-pin serial I/F via the system library. The 8-pin serial I/F is located on the side panel of the main
unit.
Pin assignment
Name
8-pin serial I/F Connection with a barcode
reader or PC
14-pin serial I/F Connection with an
expansion I/F device
IrDA 1.0 Communication with an I/O
Box or between two IT2000s
(Modem card) Modem card
IrDA 1.1 Communication with an I/O
Box or between two IT2000s



Fig. 2.10
42
Uses
 
 

Remark
Can be switched
via the system
library.
If a modem card is
used.
Direct control not
possible
Pin 1. SD
Pin 2. RD
Pin 3. RS
Pin 4. CS
Pin 5. Vcc
Pin 6. GND
Pin 7. ER
Pin 8. DR