SOUND duation

SOUND duration

Hello All,

Reading through the manual I notice that SOUND has a "duration" of approximately 10mS at 4Mhz. Is it possible to have a duration of 1mS. Can a SFR be "Poked" to force the Sound to use a 1mS duration? I am currently running my 28X2 chip project at 16Mhz which I believe this shortens the "duration" down to 2.5mS. But I'd really like it to be 1mS. Is that possible?

Many Thanks.
The Addict

No, there is no means to control the tone duration beyond doubling operating frequency to halve the duration, but there may be other ways to achieve whatever you are trying to accomplish.

A 1mS 'sound' is just one cycle of a 1KHz wave, or 10 cycles of a 10KHz wave.

Neither of these is going to sound like anything more than a 'click'.

What exactly are you trying to do ?.

Buzby said:

What exactly are you trying to do ?.

Click to expand...

As this is a HAM, I guess AFSK RTTY.

It is a Morse Code electronic keyer, but also has some Morse practice functionality. Like sending random words, letters, numbers, punctuation, call signs to a small speaker.