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Read from a 16C55A using CCSLOAD?

 
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randy.shaffer



Joined: 21 Mar 2018
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Read from a 16C55A using CCSLOAD?
PostPosted: Tue Mar 04, 2025 9:54 am     Reply with quote

I have a legacy product and was trying to read the PIC16C55A with CCSLOAD, but when I select the part number from the device list, it will not appear in the Target Chip box (nor will any "C" type part, it seems). Is CCSLOAD not able to read these types or I am I doing something wrong?
Software: 5.085, Firmware: 3.61, Hardware: Rev 3 (PID 195)
temtronic



Joined: 01 Jul 2010
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Location: Greensville,Ontario

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PostPosted: Tue Mar 04, 2025 11:53 am     Reply with quote

You might try PIC16F55 and see if it likes it ??

'C' would be quartz window version,so hope you had it covered !
randy.shaffer



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PostPosted: Tue Mar 04, 2025 1:08 pm     Reply with quote

Thank you for the reply.
I couldn't find a '16F55' in the CCSLOAD list. A '16F54' did, however, seem to work for a '16C54'.
temtronic



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PostPosted: Tue Mar 04, 2025 2:26 pm     Reply with quote

hmnm, what do you have for a programmer ? You could use MPLAB8c92 and a PICkit3 ??
gaugeguy



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PostPosted: Tue Mar 04, 2025 3:29 pm     Reply with quote

I believe the 16C55 used parallel programming instead of the serial programming so new serial only programmers will not work.
randy.shaffer



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PostPosted: Tue Mar 04, 2025 3:41 pm     Reply with quote

I'm using ICD-U64. The 16C55 is in the CCSLOAD device list, but when selected, the device box remains blank. I'll look into MPLAB & the PICkit3, thank you.
temtronic



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PostPosted: Tue Mar 04, 2025 4:08 pm     Reply with quote

for sure it'll program with a PICSTART+, I have 2 'somewhere'.... course you'll need a PC with a 9 pin COMPORT..... Surprised

booted up the 'beast'..... MPLAB 7v51 and PICSTART+ LIKE the 16C55 !
randy.shaffer



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PostPosted: Tue Mar 04, 2025 4:19 pm     Reply with quote

Thank you! I'll look into those. I think I need to convince management to update this legacy product... Very Happy
temtronic



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PostPosted: Tue Mar 04, 2025 5:12 pm     Reply with quote

Hay, if it ain't broke, no need to fix !!!

Seriously though, a 'daughter' PCB with say, hmm, a 16F84 might be an option ???

Odds are the new PIC and PCB will be cheaper than a 16C55 !
randy.shaffer



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PostPosted: Tue Mar 04, 2025 5:30 pm     Reply with quote

Good point, thank you!
Ttelmah



Joined: 11 Mar 2010
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PostPosted: Wed Mar 05, 2025 10:27 am     Reply with quote

I remember there was an 'oddity' with some of those early chips. On
some programmers you had to disconnect the OSC2 pin in order to program.
Used to have to have a jumper and take it off when programming.
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