Casio IT-2000D - Manual (Page 45)

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2.3.5 Serial Communication
Available Interfaces
Port I/O Address Name Uses Remark
COM1 3F8h-3FFh 8-pin serial I/F Connection with a barcode
reader or PC
14-pin serial I/F Connection with an
expansion I/F device Can be switched
via the system
library. COM2 2F8h-2FFh
IrDA 1.0 Communication with an I/O
Box or between two IT2000s
COM3 3E8h-3EFh (Modem card) Modem card If a modem card is
used.
COM4 2E8h-2EFh IrDA 1.1 Communication with an I/O
Box or between two IT2000s Direct control not
possible
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.
Signal Pin 1. SD
Pin 2. RD
Pin 3. RS
Pin 4. CS
Pin 5. Vcc
Pin 6. GND
Pin 7. ER
Pin 8. DR
Fig. 2.10