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<DIV>Hello,</DIV>
<DIV> </DIV>
<DIV>Anyone out there have a design guide for Winbond ISD1700 series voice
recorder chip?</DIV>
<DIV> </DIV>
<DIV>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.</DIV>
<DIV> </DIV>
<DIV>If I can't get an answer -- </DIV>
<DIV>I am getting pretty serious about doing my own recorder. Flash is
cheap.</DIV>
<DIV>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.</DIV>
<DIV> </DIV>
<DIV>That is the nice thing about Winbond chip -- incorporates filters for
input and output</DIV>
<DIV>simplifying the design... Also, has a Class D speaker driver built on the
chip.</DIV>
<DIV> </DIV>
<DIV>I only need about 10 to 20 seconds of recorded speech.</DIV>
<DIV>certainly I could use Winbond chip with button interface, but really wanted
to go with SPI.</DIV>
<DIV>Also, I think that SPI is needed for that series to control things like
input source microphone vs line input..</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>Ron</DIV>
<DIV> </DIV>
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