Paul Keinanen wrote:
> However, if the memory content is to be maintained for a long time
> without any data access in a battery powered device, it would make
> sense to reduce the refresh rate at low ambient temperatures. The high
> refresh rates are needed at the top end of the temperature range, but
> at lower temperatures, a slower refresh rate would be sufficient,
> which reduces the power consumption and increase battery life.
> Unfortunately, refresh rate figures are seldom available for lower
> temperatures.
If you were really aiming for long run time on battery power, I suppose
you'd just use DRAM devices specifically made for such an application.

Mobile SDRAM devices often have a temperature compensated self refresh
feature. You just enter a special suspend mode and the device does the
refresh itself, and only as often as required according to the current
temperature. You can also tell it to just refresh a part of the memory
array, in case you don't use it all.

This is usually way better than anything one could do on his/her own.

So, the question still stands: What does the OP really want to do?

cu,
Sean

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