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[DPRG] Winbond Voice Recorder - Design Guide?

Subject: [DPRG] Winbond Voice Recorder - Design Guide?
From: Jeff Koenig koenig.jeff at gmail.com
Date: Tue Feb 19 18:00:41 CST 2008

Hey Ron -

I requested an ISD1700 design guide a couple of hours ago and just got
it sent to me, along with a message from a rep saying that he's
"pretty familiar" with the device if I need help with it.

I'll e-mail it to you off-list.  If anyone else wants a copy, let me know.


> Anyone out there  have a design guide for Winbond ISD1700 series voice
> recorder chip?
> I requested their design guide a week+ ago, then again yesterday, no
> response -- other than a response from their sales department when I wrote
> them and they sent an email to the same email link I had sent to.
> If I can't get an answer --
> I am getting pretty serious about doing my own recorder. Flash is cheap.
> AVRs have nice A/D leaving the question open whether to do PWM with fancy
> filter (Atmel has an example using a 6th order filter) or to go with a DAC /
> resistor ladder and maybe much simpler filter.
> That is the nice thing about Winbond chip -- incorporates filters for  input
> and output
> simplifying the design... Also, has a Class D speaker driver built on the
> chip.
> I only need about 10 to 20 seconds of recorded speech.
> certainly I could use Winbond chip with button interface, but really wanted
> to go with SPI.
> Also, I think that SPI is needed for that series to control things like
> input source microphone vs line input..
> Ron
>  ________________________________
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