AVR-Chat

At 07:47 PM 7/19/2004 +0000, dpalu2 wrote:

>Hello,
>  I would like to add some external SRAM to an existing project and 
>would like to know of what pitfalls I should avoid. I purchased the 
>STK501 development board and read the manual about interfacing 
>external SRAM to an ATmega128 chip. The manual was pretty specific 
>about what type of SRAM should be used. I was wondering if people 
>have had success with other types of SRAM not mentioned in the 
>manual. Speed isnt really an issue. Operating current is an issue 
>since I would like to keep it as low as possible. Any help or hints 
>would be great.

Just about any SRAM will work, as long as it's fast enough.

But you don't have to use it through their SRAM interface. 
You can latch and set the address through I/O port bits, or even serial/parallel latches. There's more than one way to store data, but if you need speed, you're pretty much stuck with the conventional system.