need 1 Kb of RAM

willie.ar · Joined: 21 Jan 2004 Posts: 15 Location: Argentina

I want to add RAM to a project. I need to buffer about 600 bytes so I need 1Kb of RAM and I can't find any serial (I2C) static RAM of that size, not either a vendor of the PCF8570. I want to use a PIC because I have all the code almost finished, the compiler, programmer, etc. Does anybody have an idea which configuration of microcontroller and RAM can I use?
tks

Kenny · Joined: 07 Sep 2003 Posts: 173 Location: Australia

How about fram? This one would suit your size requirements.
http://www.ramtron.com/lib/literature/FM24C16Ads_r2.1.pdf

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

willie.ar · Joined: 21 Jan 2004 Posts: 15 Location: Argentina

thanks for your answers.
The project is running now buffering 50 bytes on a 16F628 so the 18F452 seems to be "so much" for that task.
the FM24C16 looks to be very interesting. I have to study the protocol to r&w, timing and availability on the market.
tks again
willie.ar

dyeatman · Joined: 06 Sep 2003 Posts: 1933 Location: Norman, OK

The FM24C16 is a drop in replacement for the standard 24C16 EPROM the only difference being there is no wait time required after writes. I used the 24c16 driver and removed the wait after write delays.