I am writing software for a system that has an AT91SAM7SE256 MCU hooked up to a Mobile SDRAM. A new requirement has come that forces me to enter the SDRAM in deep power-down mode to save on power when the system is not used. I am not able to affect the design of the hardware this late in the project.
I see from the data sheet that the AT91 does not support the deep power-down mode of the SDRAM, which is really akward for me to say the least. Is there any knwon way of causing the chip to enter this mode anyway? (bitbanging the bus or similar)
/Daniel