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Architectures and Processors forum Interface Cortex M4 and PSRAM with different power supply voltage

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Interface Cortex M4 and PSRAM with different power supply voltage

DavidCavalheiro over 8 years ago

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

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Joseph Yiu over 8 years ago +1 verified

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...