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5.3.2 Interface

1) Connector
D-sub 9 pin
2) Pin assignment
PIN NO.
Symbol
2
TXD
3
RXD
8
CTS
5
GND
3) Baud rate
4800 bps (possible settings include 1200, 2400, 9600, and 19200 bps)
Notes: Set this value so that the machine's baud rate equals the PC baud rate.
4) Data format
Start : 1-bit
Data
: 8-bit
Parity : 0 (no parity)
Stop
: 1-bit
5) Connection
COMPUTER (PC-98)
RXD 3
TXD 2
CTS 5
GND 7
* Third-party D-sub 9P-D-sub 25P conversion cables are available commercially.
6) Protocol
From PC to plasma display
(1) When commands are sent serially (one by one).
STX
COMMAND
(2) When groups of commands are sent
STX
COMMAND
(3) In the case of commands followed by numbers in the 0-255 range
STX
COMMAND
Note) For the following commands, only the first command is valid. Other commands are ignored.
Example 1)
STX
PON
Example 2)
STX
POF
Example 3)
STX
Signal NAME
Transmitted Data
Recieved Data
Clear To Send
Signal Ground
Plasma display
2 TXD
3 RXD
8 CTS
5 GND
ETX
COMMAND
ARGUMENT
AJY
CNT
ETX
PON
ETX
IN2
AJY
CNT
ETX
Outer control by RS232C
COMPUTER (IBM PC)
RXD 2
TXD 3
CTS 8
GND 5
STX=02h ETX=03h
COMMAND
ETX
ETX
ARGUMENT : 3-Byte (ASCII)
Send the PON and POF commands one by one.
(Allow 3 seconds or longer between commands.)
Send input switching commands (IN 1 - 4) and "AJY"
commands separately. (Allow at least 1.5 seconds after
input switching commands (IN 1 - 4) are set before
sending any other commands.)
Plasma display
2 TXD
3 RXD
8 CTS
5 GND
Straight cable
COMMAND 3-Byte (ASCII)
Up to three commands may
be sent at a time.
note)
127
<Ver. 2.1>

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