[sdiy] Holtek HT36A4 8-Bit Music Synthesizer
ebrombaugh at earthlink.net
Fri Feb 29 16:49:06 CET 2008
Jim Thompson wrote:
> Hey Group,
> Sorry I missed the Holtek thread but I was hoping somebody could please take a look at the info and datasheet links below for their Music I.C. It appears to have some nice musical functions and they say it is 8 note polyphonic.
> I have a supply of them if anybody thinks that they would be functional for SYNTH use, please let us know or contact me off list. I would be happy to provide them to any curious individuals with programming skills as I have none. (But I can solder circles around most software engineers.) 8P
Interesting. Glancing over the datasheet it looks like a typical low-end
8-bit MCU, comparable to your average 16-series PIC. The standout
feature is the 16-bit DAC they've put on it.
I notice that nowhere in the datasheet or on the website is there any
information about programming it. Since they specifically call out ROM
storage, that suggests it's a mask-programmed device that can only be
configured at the factory during fabrication. That's a bit problematic
for the average hobbyist.
If you've got a bunch of them, perhaps they're pre-programmed with some
sort of synthesis code. Any idea what it does? Details about that would
be helpful to determine if this is usable.
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