MSP432P401R: UART idle 0V?

Cristian Monea

Expert 1795 points

Part Number: MSP432P401R

Hello! Can the UART be configured on MSP432 to output 0V when nothing is transmitted (idle)?

over 8 years ago

0 Dennis Eichmann over 8 years ago

Guru 74080 points

UART idles high, so when you want it to be low you will have to reconfigure it to a controlable portpin when UART is not used.

0 Cristian Monea over 8 years ago in reply to Dennis Eichmann

Expert 1795 points

I asked this question, because I know that Microchip's dsPICs have this option in the registers.

0 Clemens Ladisch over 8 years ago in reply to Cristian Monea

Guru 318920 points

A low signal level would correspond to a start bit, or to a break when it's longer.

The dsPIC can only invert all of the UART signals (regardless of whether it's idle or not). The MSP does not have this function; you'd have to use an external inverter logic gate, or might be able to wire up the built-in comparator as a (slow and power-hungry) one.

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MSP432P401R: UART idle 0V?