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I did make a programmer that worked successfully, but felt that I did not really have to do so. You will be comparing your results with the timing diagrams in section This should have everything you need to make it work plus a little extra.

For a product I’m developing I allow the user to pass a message 0 to N ; I then find the beginning of memory, count EOMs to find the message, then set the end address to the end of memory.

Hello everyone, I hope someone can clear some things up for me on this forum, about the isd17xx. Hope this helps some. I like to see the bits — every one of them! Tue Apr 26, 1: You referenced page Thats the part what i dont understand correctly.

But it seem really hard to use this chip. Get what you mean.

ISD1700 Series ChipCorder

Is the start address of sound 2 the end address of sound 1? As for the section 7 in datasheet analog path configuration, actually is it related to SPI? My problem is datahseet I’m not getting the proper responses from the chip when I send commands. I also wanted to pay datzsheet attention to the power routing on my PCB for the separate analog and digital power pins and their respective bypass caps.

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ISD datasheet, Pinout ,application circuits ISD Series ChipCorder

If you can not retrieve the Device ID, well, keep trying. I have been “out” for a while and have not seen your request. The pins have built-in pull-up resisters. When I put them together the expected results fail.

I ended up just using my design board for both standalone mode and SPI mode. But it did take the effort to write and post my initial forum submission. How do i get the end address of a message? I programmed assembly language and machine language back in the sixties just after we got radio and heard about TV.

Anyway, I will try my best and look at the datasheet again, again and again. Below are links that I found helpful. I have not been too happy with the volume level from the chip. But for some reason, I have difficulty putting commands together single-stepping to observe register results.

So the code I wrote has everything you need to record and playback sounds of varying length. They are a checklist. I don’t have the 16F, but they are in the same family. I finally got this chip working, though when I read the DEVID it seems to think its a rather than a receivingexpecting I laid out my components for a PCB in a different manner than the photo shows.

That’s exactly what I thought, but then I tested the output of SDO with my scope and there was nothing coming out. However, this section may be a simple test to answer your next question as to whether or not the ISD chip is good or defective. Mon Apr 25, 5: You will do well also. I’m trying my own little prodject and I want good quality sound.

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Datasheeh even upload onto the ‘working programs’ forum here, for others I used the analog input Anain. I do have to say, however, that there is a case that kept me from understanding this long ago. Just to confirm it. After a long delay I am back working with the ISD17xxx series and finally having some luck.

However, as I said, I feel it was fundamental to catching my isv1740. Hope you don’t feel irritating that I keep asking the stupid question.

CCS :: View topic – Spi comm with ISD

Then they suggested that we redesign our product around one of their other chips. SPI mode offers seamless transitions between sound messages using a buffer which is the feature I require in my application. If you skip this you are on your own. I extend my apologies to those who may have labored through my post. Anyway, something wrong somewhere, I have follow exactly the circuit in page 76 with a voltage regulator to supply it 5V.

I now have successful 2-way communication with the ISD.