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PIC12 development (pin replacement in debugging)

 
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Jeff King



Joined: 20 Oct 2003
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Location: Hillsdale, Michigan USA

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PIC12 development (pin replacement in debugging)
PostPosted: Tue Oct 27, 2015 9:35 pm     Reply with quote
Wanting to do some development with the PIC12F1572 series of parts. Of the 6 pins 3 are taken up with the ICSD.

Is there a comparable part one might use to debug on to get back the missing pins? I know microchip has a few pin expansion debug headers but none for this one.
PCM programmer



Joined: 06 Sep 2003
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PostPosted: Wed Oct 28, 2015 1:22 am     Reply with quote
Use this tool:
https://www.microchip.com/maps/microcontroller.aspx
At the top, select the tick boxes for 8-bit and current. Deselect the others.

Then scroll down to the Digital Peripherals section and set PWM Res (bits)
to 16, and set PWM Chan to 3. Do this in the left column.

For the results, I get the two 12F parts and several from the 16F17xx series.
Jeff King



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PostPosted: Wed Oct 28, 2015 2:09 am     Reply with quote
Thank you
Ttelmah



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PostPosted: Wed Oct 28, 2015 3:42 am     Reply with quote
Have you also considered just asking MicroChip?.
In the past when working on reasonably 'new' chips, I've found they have debug versions available as a chip, but not yet manufactured into headers. They are normally identical dies to the standard chips, with extra legs bought out (they are even 'seen' as the standard chip, by programmers etc.).
Jeff King



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PostPosted: Wed Oct 28, 2015 9:28 am     Reply with quote
Ttelmah wrote:
Have you also considered just asking MicroChip?.


I did 2 days ago, no answer which is typical. I saw other debug chips (for the 508 for example) on the MC store but none for the part in question.

While a true debug chip would have been ideal, I can work with the answer PCM programmer gave me since the peripheral set and clock speed are either similar or identical.

If I hear back from MC I'll update the thread.

Thanks
Ttelmah



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PostPosted: Wed Oct 28, 2015 9:46 am     Reply with quote
What did you actually ask 'for'?.
Generally these are 'debug devices', so somebody looking for a 'header', won't get the answer they want.

Haven't you got a technical support number to actually call MicroChip?. In the UK, they are very good.
Jeff King



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PostPosted: Wed Oct 28, 2015 11:44 pm     Reply with quote
Ttelmah wrote:
What did you actually ask 'for'?.


Please see my question above and the answer PCMProgrammer provided. The parts I need are on the way.

Quote:
Haven't you got a technical support number to actually call MicroChip?. In the UK, they are very good.


That's good to hear. Wading through voice mail prompts at corporate headquarters and waiting for return calls is not generally a good use of my time. I have a good relationship with my local rep but he always doesn't get back to me in a timely fashion. Was there an issue asking here? I've been on this forum 10+ years and have put out multiple CCS compiled products but don't post much (almost always a search turns up the answer I seek), but since the question hadn't been asked, not only did it help me, but hopefully seeded the search engine in case someone in the future has a similar question.
Ttelmah



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PostPosted: Thu Oct 29, 2015 12:45 am     Reply with quote
No problem at all, but debugging with a different chip is always going to leave some problems. A real debugger for the real chip is (obviously) going to be much better, and I wanted to make sure that you had tried to source this first. The reason I'm so sure these will exist (even if MicroChip don't list them), was I was told by MicroChip a while ago, that they always produce the dies for these 'in house', as part of the initial development of the chip. I was supplied bare dies when I asked for these on another chip, before the real chip even existed. However they did know we had the ability to make the connections to these....
Jeff King



Joined: 20 Oct 2003
Posts: 43
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PostPosted: Thu Oct 29, 2015 12:47 am     Reply with quote
Good point. I'm adverse to using the phone but will call my rep up.
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