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'differences between 16C84 and 16F84'
1997\02\28@210014 by Duncan Christie

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What is the difference (other than RAM) between the 16C84 and the 16F84?

Thanks

Duncan

1997\02\28@215625 by Don McKenzie

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Duncan Christie wrote:
>
> What is the difference (other than RAM) between the 16C84 and the 16F84?
>
> Thanks
>
> Duncan
-----------------------------------------------------------------------
Recent questions on the 74 and 84s from programming point of view have
prompted me to repost the response to two messages that were written by
Jim Robertson of Newfound Electronics.

Jim currently isn't on the PICLIST, but has reasonable experience with
these
devices, as he is the designer of the Warp-3, PP1, and Warp-17
programmers.

======================================================================
74 and 74A

At 10:28 AM 1/10/97 GMT+1100, you wrote:
{Quote hidden}

Tony,

Do this:

Reverse the PWRTE bit, if you want it "ON" select it as "OFF" and vice
versa.

Do not code protect the 16C74A! You will not be able to erase the code
protection bits if you do.

The Brownout will not be available on you "A" part. It will (should!) be
turned "OFF" by default by your programmer.

There are extra code protect bits in the "A" part but as you are not
programming them they do not matter.

All the other config bits, ID etc are the same!

Just remember to not code protect the "A" part and you should be ok.

Jim

=================================================================
C84 and F84

At 09:48 AM 1/16/97 -0500, you wrote:
>Please excuse my confusion. What is the difference between the
>EEPROM 16C84 and the FLASH 16F84? I know the 'F has more RAM bytes,
>but aside from this, what's the practical difference? Is there
>any difference in programming, number of write cycles, etc?
>
>-Tony

16F84 has PWRTE bit reversed (like ALL newer parts) when compared to the
16C84. All the spare config word bits in the 16F84 are used for code
protection. The effect of code protecting a 16F84 is different from a
16C84.

(If you want to know the esoterica of it all download the programming
specs
form the microchip web page but it usually is of little interest  to the
"man in the street.")

Programming wise, you can program the 16F84 as a 16C84. Remember to
reverse
the code protect bit and don't expect code protection to be the same.

Jim
==============================================================

Don McKenzie  spam_OUTdonTakeThisOuTspamdontronics.com   http://www.dontronics.com

Send a blank message to .....helpKILLspamspam@spam@dontronics.com for more info.
SLI, the serial LCD that auto detects baud rates from 100 to 125K bps.
SimmStick(tm) A PIC proto PCB the size of a 30 pin Simm Memory Module.


'differences between 16C84 and 16F84'
1997\03\03@100325 by Richard G. Thomas
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> Recent questions on the 74 and 84s from programming point of view have
> prompted me to repost the response to two messages that were written by
> Jim Robertson of Newfound Electronics.

> 16F84 has PWRTE bit reversed (like ALL newer parts) when compared to the
> 16C84. All the spare config word bits in the 16F84 are used for code
> protection. The effect of code protecting a 16F84 is different from a
> 16C84.
>
> Programming wise, you can program the 16F84 as a 16C84. Remember to
> reverse
> the code protect bit and don't expect code protection to be the same.

Confused/worried is this correct or should it read reverse the PWRTE bit?

----------------------------------------------------------------------------
| Richard Thomas                                          Computer Officer |
| Department of Design,                                                    |
| Brunel University,  Runnymede,  Egham,  TW20 0JZ,  UK.                   |
| Richard.ThomasspamKILLspambrunel.ac.uk                  phone:  01784  431341  x267 |
----------------------------------------------------------------------------

1997\03\03@211659 by Don McKenzie

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Richard G. Thomas wrote:
{Quote hidden}

Sorry Richard, I was just quoting Jim's text without digesting it fully
myself, yes should read:

Programming wise, you can program the 16F84 as a 16C84. Remember to
reverse the PWRTE bit and don't expect code protection to be the same.

There I think that's closer.

Don McKenzie  EraseMEdonspam_OUTspamTakeThisOuTdontronics.com   http://www.dontronics.com

SLI, the serial LCD that auto detects baud rates from 100 to 125K bps.
SimmStick(tm) A PIC proto PCB the size of a 30 pin Simm Memory Module.
Covers all versions of the PIC16cxx family plus the Atmel AT89C2051.


'Differences between 16C84 and 16F84'
1999\06\28@122207 by robertog
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part 0 16 bytes
</x-html>

1999\06\28@193837 by Tony Nixon

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Your code should function exactly the same if copied from a C84 to an
F84.


--
Best regards

Tony

'The Engine Programmer' - Is this the end of the firmware upgrade?

http://www.picnpoke.com
Email picnpokespamspam_OUTcdi.com.au

1999\06\28@213544 by robertog

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Thanks Tony that at least answers that question. Now back to the drawing
board.

Cheers ... Bob

> {Original Message removed}

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