Sounder by Deltronic Labs. Rev. 1.01
4
PGM Connector
Pin
Function
9 Pin Sub D
at PC
1
RX (data from PC to Sounder)
3
2
TX (data from Sounder to PC)
2
3
Do not connect
4
Do not connect
5
Un-used
6
Do not connect
7
Ground
5
8
Un-used
Note: When used to program the Sounder board, pin 3 is connected
to pin 4 and pin 6 is connected to pin 7. When used for control these
connections should not be made. The Sounder board should be
power cycled (turn off, then on) when switching between control and
program modes.
The high nibble of each command indicates the type of action. Except for the special
commands, the low nibble encodes the sound number to be used.
Commands
High Nibble Action
0
Special Command (see the special command table)
1
Play on channel A. Low nibble = sound number -1
2
Play on channel B. Low nibble = sound number -1
3
Play on channel A & B. Low nibble = sound number -1
Special Commands
Low Nibble
Action
0
Stop playing both channels
1
Stop playing channel A
2
Stop playing channel B
3
Stop playing both channels when they finish their current repetition
4
Stop playing channel A when it finishes the current repetition
5
Stop playing channel B when it finishes the current repetition
6
Report the status of channel A
7
Report the status of channel B
Sounder responds to the status report special commands with a single byte which is
the number of the sound being played, or zero if no sound is being played.
