TMS570LC4357: emif interface to a external dpram

Hello Sushma,

If you have 2 asynchronous memory devices connected MCU through EMIF, those devices can use different chip select. LC43x device has 3 chip selects (EMIF_nCS[4:2]) for asynchronous memory. Those pins are active only during accesses to asyn memory.

If you have only 1 memory device connected to MCU, and you want to toggle address pins only, you might try to pull WE and OE both high and do read operation. I didn't try this way before.

Hello QJ Wang,

Thank you for the reply and suggestion. I will try it out.

Thanks you, let us know your test result.

Not able to toggle address pins only by read operation, as in the design WE is connected DPRAM!!!!!!!
Main task is to write the External ADC data into a DPRAM (controlled by TMS570). In the design, WE is connected to Write Enable of DPRAM & its address lines are connected to TMS570LC4357 EMIF address lines.
So, if i need to write ADC data to DPRAM, WE should be made LOW.
So thinking of changing the design...