external memory

[docwisdom]

what is the best external memory method for low quantity data?
external meaning another chip, not removeable or anything fancy like that



I wanted to use onboard EEPROM but my 767 doesnt have any. I only need to write 9 byte variables.

I was looking at serial EEPROMs by microchip. Any suggestions on which chip? Should i go for i2c, spi?

[mister_e]

you have two choice here, Change PIC for another who have an internal EEPROM OR for only few bytes look for those
I2C:
24c00
24c01

SPI:
93c06
93c46

I2C need only two i/o, SPI need 4. Both will do the job as well. SPI is a bit faster but... do you really need it?

90% of my design use I2C EEPROMs

[docwisdom]

thanks very much, i was looking at the 24c00

I dont need speed, and microchip doesnt make a pic with 3 hpwms and eeprom, so I have to use external.

now I just hope I have some free I/O on my pic.

[bbarney]

have a look at port expanders

http://www.picbasic.co.uk/forum/showthread.php?t=2625&highlight=port+expander