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TWI details not in TWI description #54

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cwalger opened this issue Mar 25, 2013 · 1 comment
Open

TWI details not in TWI description #54

cwalger opened this issue Mar 25, 2013 · 1 comment

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@cwalger
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cwalger commented Mar 25, 2013

Can you add voltage details to the TWI description? The third argument of openTwiMaster sets I2C or SMBus levels, but both protocols have multiple standards with multiple voltages. Could you point out expected voltages of each option (I'm guessing 5 and 3.3V)? Are the threshold voltages the only difference between the two modes?
@cwalger
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cwalger commented Mar 26, 2013

I looked it up on the PIC24FJ256DA206 datasheet.

Low level max / High level min:
I2C = 0.3_VDD / 0.7_VDD = 1.5V / 3.5V
SMBus = 0.8V / 2.1V

Could these be added to the TWI page?

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