The problems you are observing can be caused either by errors in the SRAM connection or by incorrect EIM bus configuration, such as bus width, endianness, CS configuration, etc."
Please provide the full name of the Toradex module you are using, along with its hardware revision, and specify the operating system image you have installed. With this information, I can assist you further.
Please also check this thread - Accessing External Memory Bus (EIM) on iMX6 via memory map - #2 by max.tx