Dear all,
could you please tell me if it is possible to interface a Cortex M4 (3.3V) with a PSRAM (1.8V) directly or do I have to add a logic level (Voltage Translation) between both?With kind regards,David
Most PSRAM devices have separated I/O supply voltages. So even if the PSRAM core operations are at 1.8v, they can be connected to microcontrollers running at different voltages.
It also depends on which Cortex-M4 microcontroller device you are using. I think for STM32 devices you can interface 1.8V memory devices to their FSMC by configuring the pins to use internal pull-up (assume that the memory device is 3.3v tolerance).