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'[PICLIST] [PIC] Beyond PIC16F84A and C Compilier'
2002\01\13@185508 by dcchan

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I have been using the free C Compilier with the PIC16F84 to do some
bit-banging serial IO (RS485) etc...

Opps, I have now run out of the 1K code space, and would need some expert
advice !

a) Next Chip
I like the PIC16F84 because of its small size. The Microchip has listed the
products PIC16F87, 88 as "Future Products"
So What would be the next chip to use ? All I need is more code space, and
nice to have more RAM space. PIC16F870 or PIC16F73 ? Somehow the PIC16F870
is listed as cheaper than the low cost PIC16F73. Any advise ? Is this the
correct next chip or are there other options....

b) C Compilier
The C Compilier I am using is the free PCCLITE for Hi-Tech which only works
for the PIC16F84. With the next chip, I will need some advice on what C
Compilier to get my hand on. The Hi-Tech C compilier and CCS C compilier are
both available from the Dontronics web page. The CCS is something affordable
at $99 dollars. Anybody can give me some advice where I can get a good C
compilier at a decent price. I need a C compilier that also allows me to
insert INLINE ASSEMBLY codes. I don't really care about the IDE etc. I am
happy using the MPLAB, and compiling the C programs in the MPLAB
environment. Any help or good advice will be appreciated.

Thanks
Derek Chan

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2002\01\13@194253 by Byron A Jeff

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On Mon, Jan 14, 2002 at 07:53:40AM +0800, Derek Chan wrote:
> I have been using the free C Compilier with the PIC16F84 to do some
> bit-banging serial IO (RS485) etc...
>
> Opps, I have now run out of the 1K code space, and would need some expert
> advice !
>
> a) Next Chip
> I like the PIC16F84 because of its small size. The Microchip has listed the
> products PIC16F87, 88 as "Future Products"
> So What would be the next chip to use ? All I need is more code space, and
> nice to have more RAM space. PIC16F870 or PIC16F73 ? Somehow the PIC16F870
> is listed as cheaper than the low cost PIC16F73. Any advise ? Is this the
> correct next chip or are there other options....

The only issue with the chips you've listed is that they changed the package
size. Probably the right chip to move up to is the 16F628. Here's the
advantage list, taken from a few previous posts of mine:

--------------------------------------------------------
- Twice the program memory
- Three times the data memory
- three timers vs. 1 for the 16F84a
- two comparators vs. 0 for the 16F84a
- twice the data eeprom memory
- hardware USART
- up to 3 extra I/O pins over 16F84a.
- 4 Mhz internal osciallator.
- Runs up to 20 Mhz.
- Can be low voltate programmed.
--------------------------------------------------------

And it's the same form factor as the 16F84 so it should run in the same socket.

It's a winner.

If you step up to the 16F87X series, then the 16F872 is probablt the best bet
in the 28 pin package. It you can live with the 40 pin package then go with
the 16F877. You'll find it's comparable in price with the 16F874 and 16F876
but with more features.

I'm leaving the compiler issue alone.

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2002\01\14@071151 by Dale Botkin

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On Mon, 14 Jan 2002, Derek Chan wrote:

> a) Next Chip
> I like the PIC16F84 because of its small size. The Microchip has listed the
> products PIC16F87, 88 as "Future Products"
> So What would be the next chip to use ? All I need is more code space, and
> nice to have more RAM space. PIC16F870 or PIC16F73 ? Somehow the PIC16F870
> is listed as cheaper than the low cost PIC16F73. Any advise ? Is this the
> correct next chip or are there other options....

16F628.  And you won't have to bit-bang the serial if you use the built-in
UART, which may save you enough code space to keep using PICC.

{Quote hidden}

I use CCS for a number of reasons...  naturally it allows inline assembly
and works fine from MPLAB.

Dale

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