DS90UB925Q-Q1: I2C no ACK questions

Eric Chen4

Expert 2370 points

Part Number: DS90UB925Q-Q1

Hi Team,

Now I use DS90UB925Q-Q1 with I2C interface but doesn't got I2C ACK from DS90UB925Q-Q1.

I2C Address: 0X15

I capture I2C waveform for your reference as below.

Would you kindy provide your suggestion for our check again?

Or you can provide refernce I2C Sample code for chck again?

Thanks.

Regards,

Eric

over 7 years ago

0 Palaniappan Manickam over 7 years ago

TI__Genius 10475 points

Eric,
If there is no I2C communication with device it is likely due to incorrect ID or aliasing.
Please confirm the address is set properly (IDx for Ser/Des) and the I2C configuration registers are set properly.

0 Steven(Shenzhen) Shi over 7 years ago

TI__Mastermind 30515 points

Eric,
please follow up the I2C timing spec. in UB925 d/s. also please confirm the I2C address of UB925 is 0x15? is it 7bits or 8bits? you can refer to UB925 d/s on I2C address setting, thanks.

best regards,
Steven

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DS90UB925Q-Q1: I2C no ACK questions