Ernst Aardal wrote:
>I am in the startup making a datalogger.
>I'll use a ADS8320, 16 bits serial a/d and a pic (16c84).
>I wonder if it is possible to use a RAM from a pc
>or at least a larger ram that can keep the data until
>it is downloaded to a pc.
>thanks for any help


Yes, of course you can use a RAM chip to store data temporarily.
"static" SRAM is much easier to interface than "dynamic" DRAM
for a small controller. Also, you can use a serial EEPROM chip
for more permanent storage, like 24Cxx series from Microchip
and others.

The biggest problem with interfacing std SRAM chips to a PIC
is the number of address and data lines you need to deal with,
at least 22-26. An 18-pin '84 is not an ideal choice. Because of
this, I recently designed my own PIC controller board with SRAM
chip, for usw with 40-pin 16C74 or similar pinout:

http://www.sni.net/~oricom/sbc40.htm

You can get some ideas there.

regards,
- Dan Michaels
Oricom Technologies
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