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UART and SDIO Conenction to External Devices, Voltage Levels

Question asked by Atilla Mete Turedi on Jan 20, 2016
Latest reply on Jan 21, 2016 by igorpadykov



I am willing to interface a BT and WiFi module that is outputting 1.8V IO. Does this mean I have to use a 1.8/3.3V level converter for the interface of

UART and SDIO? Where exactly can I find the information regarding the voltage levels of different blocks say HDMI, SPI, I2S etc.