Interface - Pioneer PDP-V401 Technical Manual

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>