RT1170 SEMC_AD11/12 state

[Eugene3]

Hi

I'm using RT1170 for my board. I connect SDRAM and SRAM on the SEMC bus.

Is it possible to set SEMC_ADDRESS11 & 12 to High or HighZ while SEMC doesn't access SDRAM or SRAM?

SEMC_ADDRESS11 & 12 are WE# and OE# for SRAM, so I'd like to set these pins to inactive state while SEMC is not accessing SRAM.

[EdwinHz · Accepted solution]

Hi @Eugene3,

The only moment where a pin is High-Z is after a reset. Once initialized, the pin will no longer be High-Z unless doing a full POR once again. For this reason, the SEMC_ADDRESS11 and 12 cannot be set to High-Z. You can definitely deinitialize these pins when not in use, but this will not set them to high impedance.

BR,
Edwin.