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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.

  ISO IEC 8825 PDF

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.


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.