Re: [sdiy] Holtek HT36A4 8-Bit Music Synthesizer‏‏

[Samppa Tolvanen]

Hello,

On 2/29/08, Eric Brombaugh <ebrombaugh at earthlink.net> wrote:

>
>  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.
>

Chips for mass market products, yes. But selection guide (
http://www.holtek.com.tw/pdf/guide.pdf ) reveals OTP versions:

HT36RA4 (& HT36RM4)

Which then needs specialized programmer from Holtek. Pricing unknown :)

Samppa