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N+2 to 3.3v I2C

Started by jmanuel, Jun 12 2013 11:57 PM

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#1 jmanuel

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Posted 12 June 2013 - 11:57 PM

Hi

 

Is safe connect the N+2 I2C bus directly to 3.3v I2c bus devices? or need to shift from 5v to 3.3v?

 

Thanks


#2 Thomas Rankin

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Posted 13 June 2013 - 12:06 AM

Should be just fine. The digital io pins on the N+2 are 3.3v.

#3 Bi Qin

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Posted 14 June 2013 - 09:11 AM

I2C is an open drain bus,the votage on the bus is decided by the pull up resistor,both pin for SCL/SDA on ND2+ is 5V tolerant.

You can connect it to any i2c device with pull up voltage equal or lower than 5V.


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