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'Which PIC?'
1997\11\17@022230 by Steven J Tucker

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I have a project that required about 20 i/o lines, program memory and
hopefully some eeprom or 2 or 3 more i/o lines for a serial eeprom.   The
i/o lines should be able to read/write TTL levels when run off 5v.

I have data in small tables (255 bytes each) that need to be stored in
eeprom I can modify.  1k of data eeprom would work, but more would be
ideal.

Any idea which PIC would be best for this?  Ideally I would like a 1
chip solution.  I've been using a 6502 and PIA for testing, and its
just too cumbersome for the final product (not to mention only 16 i/o lines).

Any experience you could lend would be helpful :)  WDC's 6502 w/ 50 i/o lines
would be perfect, but they dont make EE or flash versions :(

Steve

1997\11\17@154921 by Eric van Es

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Hi

Can't you get away with port expansion? If so, a PIC16C84 or 'F84 will do the
trick. EEPROM program code and some 32 EEPROM internal (RAM) registers.

Steven J Tucker wrote:

> I have a project that required about 20 i/o lines, program memory and
>  hopefully some eeprom or 2 or 3 more i/o lines for a serial eeprom.   The
>  i/o lines should be able to read/write TTL levels when run off 5v.

--
Eric van Es               | Cape Town, South Africa
spam_OUTvanesTakeThisOuTspamilink.nis.za | http://www.nis.za/~vanes
LOOKING FOR TEMPORARY / HOLIDAY ACCOMODATION?
http://www.nis.za/~vanes/accom.htm

1997\11\18@200551 by Alex I. Torres

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Hi All!

> I have a project that required about 20 i/o lines, program
> memory and hopefully some eeprom or 2 or 3 more i/o lines
> for a serial eeprom.   The i/o lines should be able to
> read/write TTL levels when run off 5v.
>
> I have data in small tables (255 bytes each) that need to be
> stored in eeprom I can modify.  1k of data eeprom would
> work, but more would be ideal.

 What about C64 or 74 (33 i/o) with 24C16  (2kbyte EE) ?

  Alex Torres,  .....altorKILLspamspam@spam@cook.kharkov.ua
  Kharkov, Ukraine.

--- GoldED 2.50.A0531+
* Origin: Future Hardware, (0572)32-31-62 (2:461/28)

1997\11\23@163225 by Christof

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Hi Steven

Try the PIC16C62A or the PIC16C63 with external EE (24C16 as suggested). You
have 22 I/O lines including lines for I2C (RC3 - clock; RC4 - data).
For your layouts remember the Package is SDIP(300mil)!

Regards,
Christof

On 18 Nov 97 at 11:42, Alex I. Torres wrote:

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