Uart Port Voltage

USA

Asked Sep 2014 — Edited Sep 2014

Resolved by Dunning-Kruger!

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Looking at the EZB spec sheet the UART TTL Voltage Level (input/output) is listed at 3.3 volts.

I am going to connect that port to a device that uses 5V TTL for communicating via serial.

I believe I would have to use a bidirectional logic level converter.

Am I correct?

Thanks

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USA

#9 Sep 2014

OK, got it!

Thanks!

USA

#10 Sep 2014

@DJ

So is my understanding correct that the UART 0 port tx and rx pins are 5 volt tolerant or are you only referring to the digital/adc signal pins?

Thanks

PRO

Synthiam

#11 Sep 2014

The signal pins of all ports on the ezb are 5 volt tolerant. (including i2c, digital, ttl/serial, adc)

USA

#12 Sep 2014

Thanks for all the responses.

USA

#13 Sep 2014

Keep in mind that D.J. is talking ONLY about the Signal pins.