MSP432P401R: Wired OR

R_K

Part Number: MSP432P401R

Hello,

We need to do "Wired-OR" connection on GPIO of "MSP432P401RIRGCR" with GPIO of "CP2102N-A01-GQFN24".
Wanted to know the FET configuration and specifications connected on GPIO of "MSP432P401RIRGCR"

Basically wanted to know if there will be any conflict in signal levels if this two device are "Wired-OR"

Can anybody share an app note or let me know if this can be done or is there any alternate way to do this?

Thanks in advance

over 8 years ago

0 Dennis Eichmann over 8 years ago

Guru 74080 points

Could you provide some sort of circuit diagram? I do not really understand what you want to do. In general you should not tie two outputs together, but you can use a diode from each pin to the input you want to drive (plus a pull-down resistor at the input).

0 Clemens Ladisch over 8 years ago

Guru 318790 points

MSP output pins cannot be configured in open-drain mode.
To make a pin high impedance, you have to make it an input, i.e., clear the corresponding PxIN bit.

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MSP432P401R: Wired OR