ViewSonic ViewBoard IFP33 Series User Manual

110
RS-232 Protocol
This document describes the hardware interface spec and soware protocols of RS-
232 interface communicaon between ViewSonic LFD and PC or other control units
with RS-232 protocol.
The protocol contains three command secons:
• Set-Funcon
• Get-Funcon
• Remote control pass-through mode
NOTE: Below, “PC” represents all the control units that can send or receive the
RS-232 protocol command.
Descripon
RS-232 Hardware Specicaon
ViewSonic LFD communicaon port on the rear side:
1. Connector type: DSUB 9-Pin Male (or 3.5 mm barrel connector)
2. Use of crossover (null modem) cable for connecon
3. Pin Assignment:
Female DSUB 9-Pin
Male DSUB 9-Pin
Pin # Signal Remark
1 NC
2 RXD Input to Display
3 TXD Output from Display
4 NC
5 GND
6 NC
7 NC
8 NC
9 NC
Provide +5V/2A power for external
specic dongle *3.0
frame GND
3.5 mm barrel
connector (alternative
for limited space)
Item Signal Remark
Tip TXD Output from Display
Ring RXD Input to Display
Sleeve GND

ViewSonic ViewBoard IFP33 Series Specifications

General

Brand	ViewSonic
Model	ViewBoard IFP33 Series
Category	Touchscreen
Language	English