INA233: Register can't program properly

Minki Li1

Prodigy 235 points

Part Number: INA233

I don't know why the MFR_ADC_CONFIG(D0h) will auto change after program.

Any idea what happen on?

And READ_VIN 88h keep output 5e01 and Shunt Voltage is 0.

Please help

Thank You

5 months ago

+1 Clemens Ladisch 5 months ago

Guru 179270 points

The four uppermost bits of the MFR_ADC_CONFIG register are reserved and must be 0100. Why are you trying to write a different value?

0 Minki Li1 5 months ago in reply to Clemens Ladisch

Prodigy 235 points

If it is a different value why READ_VIN 88h keep output 5e01?

0 Castrense Nigrelli 5 months ago in reply to Minki Li1

TI__Expert 3320 points

Hello,

You should not be writing to reserved register bits. Also your Read_Vin is reading the bus voltage. If you want to read the Vshunt read MFR_READ_VSHUNT (D1h).

Regards,

Cas

Amplifiers

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INA233: Register can't program properly