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How can we power off the SDRAM on the LPC4357FET256?

Question asked by Billie Spencer on Apr 21, 2017
Latest reply on May 29, 2017 by Yuri Ivanov

We are using the Samsung 256 Mb N-die model K4S561632N-LI75 ( with the CPU --- LPC4357FET256 ARM Cortex-M4/M0|32-bit MCU|NXP.


We have been unsuccessful in putting the SDRAM into a deep sleep mode (turning off).  No mater what we do, the deep sleep current draw stays ~8 mA.  We do not need to preserve the content in the SDRAM.


So, how can we configure the EMC on a Cortex M4 to put the SDRAM in deep sleep (minimal current draw)?


Thanks in advance!