I use 8K serial eeproms type 24lc65 (8 can be used to give 64K) Read them using the iic routines and only 2 i/o lines are used. They can be read sequentially ----- Stephen H Alsop ----- email: s.ssystems@easynet.co.uk www : http://easyweb.easynet.co.uk/~s.ssystems S&S Systems Ltd, Bretton Court, Manor Road, Wales Village, Sheffield S31 8PD, England. Tel: 01909 773399 * Fax: 01909 773645 ---------- : From: Boston Medical Technologies : To: Multiple recipients of list PICLIST : Subject: Static RAM : Date: 11 December 1996 13:47 : : I'm a PIC newbie (but an EE oldie), and I am just starting to think : about a project based on a Microchip PIC. I'll be needing to store up : to 10k or more of data, which will be accessed in a sequential fashion : (like a data logger)--take a reading, write to memory, take the next : reading, write to memory, and so forth. When we're done taking data, it : will come out in the same way, that is, sequentially. : : >From what I've read, it seems that the traditional way to add memory to : a PIC is to use EEPROM, rather than SRAM or DRAM. Now I know that DRAM : can be a pain, but is EEPROM preferable to SRAM for any particular : reason, beyond power considerations? : : In my case, I'll be plugged into the wall, so I've got plenty of juice. : Has anyone had good or bad experiences with SRAM and PICs? Any : particular models or interfacing methods? : : Thanks in advance for your consideration. : : Al Cohen : Boston Medical Technologies