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'8K EPROM PIC? (need something compatable with my 1'
1997\02\18@031613 by NEIL GANDLER

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I was wonderig if Microchip has a PIC that has over 4k or EPROM,
preferably 8K. I am currently working with a 16C74, but I am running
out of program space (lots of LCD data). An external eprom is out
of the question at this point. Just curious if their is a PIC upgrade
that could solve this problem. Thanks

Neil Gandler

1997\02\18@040428 by Eric Smith

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Neil Gandler <spam_OUTv064mb9kTakeThisOuTspamubvms.cc.buffalo.edu> writes:
>  I was wonderig if Microchip has a PIC that has over 4k or EPROM,
> preferably 8K.  I am currently working with a 16C74, but I am running
> out of program space (lots of LCD data).

PIC16C76 and 16C77, in 28 and 40 pin packages respectively.  I'm not sure
if you can actually get them yet.  Also the 16C66 and 16C67 if you don't need
the A/D converter.

> An external eprom is out of the question at this point. Just curious if
> their is a PIC upgrade that could solve this problem. Thanks

Have you considered an I2C serial EEPROM?  Only takes two port pins, and
Microchip has them in sizes up to 64Kb (8K bytes).  Other vendors have
announced 128Kb and 256Kb sizes.

Also, if you need lots of memory, the National Semiconductor NM29A040 or
29A080, which are 4 and 8 *megabit* serial flash parts.  They use National's
MICROWIRE(tm) interface, which is similar to SPI and needs 3 or 4 I/O pins
on a microcontroller.

For MICROWIRE and SPI interfaces, you could even share all of the I/O pins
with the LCD module except for the chip select.

Cheers,
Eric

1997\02\18@073540 by Andre Champagne

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Take a look at Application Note TB-011 from Microchip.  You can use your PIC
with SRAM
Maybe this could solve your problem


At 03:05 18/02/97 -0500, you wrote:
> I was wonderig if Microchip has a PIC that has over 4k or EPROM,
>preferably 8K. I am currently working with a 16C74, but I am running
>out of program space (lots of LCD data). An external eprom is out
>of the question at this point. Just curious if their is a PIC upgrade
>that could solve this problem. Thanks
>
>Neil Gandler
>
>
E-Mail: .....ve2wnfKILLspamspam@spam@ican.net (Andre Champagne)
Packet: VE2WNF@VE2CPT.#MTL.PQ.CAN.NA

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