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Plasma TV
Hitachi RS232C Communication Specification
This document defines the detailed RS232C control protocol for the following Hitachi Plasma
Televisions:
Model: 42EDT41A
CMP420V1A
CMP420V2A
The Information enclosed is subject to change without notice. Please refer to revision number
shown above when inquiring about product support.
1. Hardware Interface
1.1-
The cable interface to the monitor is a 9 pin D-Sub type.
1.2-
The gender of the 9 pin D-sub on the monitor is male. Therefore, the cable interface to
the monitor should be female.
1.3-
The cable is configured in a null modem wiring scheme
1.4-
A pin reference illustrations is provided below:
x y z { |
} ~ €
Figure. 1 (a) Male 9 pin D-sub
(Outside View)
| { z y x
€ ~ }
Figure. 1 (b) Female 9 pin D-Sub
(Outside View)
1.5-
Electric: Electrical specification is based on the current RS232C standard.
2. Communication Format
2.1- Port Configuration
(1) Communications System:
(2) Bit Rate:
(3) Data Length:
(4) Parity:
(5) Start Bit:
(6) Stop Bit:
Pin #
Signal
1
NC
2
RXD0
3
TXD0
4
NC
5
GND
6
NC
7
NC
8
NC
9
NC
Frame
GND
Asynchronous
9600 bps
7 bit
None
None
1 bit
10
Remark
PDP ← Control PC
PDP → Control PC
PDP ↔ PC GND
PW1A
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