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10 years, 7 months ago.
Can Mbed I2C Master drive a slave working at 3.5 volts?
Hi
I have a problem i am trying to connect my mbed with a PLC kit i brought from cypress it works at 3.5 as input for I2C. Can the Mbed drive a slave with these specifications ??
as it outputs 3.3 volts ...
can anyone help ??
1 Answer
10 years, 7 months ago.
The 3v3 outputs should work. Use pullups resistors to mbeds 3v3 vout. You can also use levelconverters like those offered by sparkfun and others, but in this case the leveldifference is small and should not be a problem, in particular when no other slave or masterdevices are using the same bus.
Thanks Wim
I am trying to use mbed with PLC kit by cypress i.e. http://www.cypress.com/?rID=38024
I have been trying to communicate with the kit using I2C but Master (mbed) does not write anything to the device. It just gets stuck during the write operation and never returns ?? what could the problem be ??
posted by 19 Sep 2013