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But for some reason, I have difficulty putting commands together single-stepping to observe register results.

Please give me dafasheet information about that, with standalone mode only, because i can’t make on SPI mode more troubles in my schedule [noparse]: The pins have built-in pull-up resisters. As for the section 7 in datasheet analog path configuration, actually is it related to SPI? I have not been able to get back to working on the audio level aspect and hope that I might be doing something wrong and the chip will perform better when I become better acquainted with it.


Are you using a microphone or Anain? When I put them together the expected results fail. The second one is the actual 17 page document with photos and schematic for a programmer.

Just to confirm it. Well it’s not the end of the world writing your own driver but how can they say it’s SPI interface if it’s not one of the 4 known SPI modes?


I think there is a problem with the 16F data sheet. It may flash once for you – see the instructions in 8. Maybe the devid is for the ‘family’ of devices and not specific to the device you have? I now have successful 2-way communication with the ISD. Actually we need to modify the datashedt I ended up just using my design board for both standalone mode and SPI mode.

Mon Apr 25, 6: I have been “out” for a while and have not seen your request. From, cincailo Thomas Taylor said Hope these thoughts help you along.

I’ve attached my latest “lab” code; it seems to work as I datasheey. Still absolutely no response from the ISD unfortunately, but I’m confident the program is correct now. Highlight the key question in each rule so you can easily and quickly scan over them as you debug. Dear Thomas, Thank you so much. Here are my thoughts based on my personal experience last year.

(PDF) ISD1740 Datasheet download

I found my problem as to why I could not execute one ISD command after another. You do not have to build a programmer. I did some testing with a 16F with your version of the compiler. My problem is that I’m not getting the proper responses from the chip when I send commands. It was just easier for me to learn the standalone mode first, then the SPI mode with the assembly programming datashedt the SX See the end of this post for an example, and a link to some routines that reverse the bits: It is a challenging chip.


Any idea to check it? That thought led me to consider the SS line, the Slave Select signal. I have been datawheet from the chip for a year, so this has been a good review for me as I now have to get back to this aspect of my project.

ISD,ChipCorder,Digital,MLS,audio recording,playback

You will be comparing your results with the timing diagrams in section CCS does not monitor this forum on a regular basis. Then I saw this note: Display posts from previous: You will do well also. I have their manual v1. Tue Apr 26, 3: I’ve never done this before, is there any special care or extra setup I should consider? Tue Apr 26, 1: As far as the analog paths: How to configure it? This is in response to a PM that came to me recently and I thought it would be better handled in the forum.