"R. Ropero" wrote:
> I have to use a 64k (8k x 8) eeprom memory controlled by a PIC. I need a
> PIC with 23 I/O (15 adressing bus and 8 data bus) or I can use a PIC
> with less I/O?
>
You'll also need /RD and /WR lines to control the EEPROM.  You can save
7 IO by adding a 74HC373 to act as a data/low address demultiplexor and
using an IO line as an ALE (Address Latch Enable).  In my configuration
(PIC16C74) I use PortE for /RD, /WR, and ALE; PortB for Adress8-15, and
PortD as a software multiplexed Address/Data bus.

One of MChip's application notes describes this exact configuration and
I think also has some software examples.

--Matt