MCF8316A: IIC communication

Cherry Zhou

Part Number: MCF8316A

Hi Team,

Here's an issue from the customer may need your help:

Customers are the IC programmer manufacturer and their customer is requesting them to support MCF8316A1VRGFR algorithm development.

Testing result is that the program and read are all normal but sometime after programmed, IIC communication will be NACK and can not be read or program again. Please refer to the result:

1. they have changed the I2C Target Address, 0-0xFF is NACK.
2. AVDD measure is 3.3V
3. DVDD measure is 1.5V
4. Vbk measure Buck regulator is 3.3V

Could you please help check this case? Thanks.

Best Regards,

Cherry

over 2 years ago

0 Anthony Lodi over 2 years ago

TI__Mastermind 26706 points

Hi Cherry,

Thanks for your question, we will aim to get a response to you on this by the end of the week.

Regards,

Anthony Lodi

0 Cherry Zhou over 2 years ago in reply to Anthony Lodi

TI__Mastermind 22235 points

Hi Anthony Lodi,

Thanks and expect the response!

Regards,

Cherry

0 Eric Chen over 2 years ago in reply to Cherry Zhou

TI__Genius 9220 points

Hi Cherry,

Since they're able to program the device normally, both FG and nFAULT pins are pulled up to AVDD through 5.1K resistor, and the voltage regulators all measures correctly, it doesn't seem to be a schematic problem.

Could you please check what they changed the I2C Target Address to? After they programmed a different I2C target address, did they make sure to use that new address to communicate with the device afterwards? I assume they're using a custom MCU to communicate with the MCF8316A?

Could they also try jumper wiring over the MCF8316AEVM's I2C communication pins to their custom PCB and try reading/writing to the MCF8316A using the GUI?

Regards,
Eric C.

0 Eric Chen over 2 years ago in reply to Eric Chen

TI__Genius 9220 points

Hi Cherry,

Do you have any updates from the customer on this topic?

Regards,
Eric C.

0 Cherry Zhou over 2 years ago in reply to Eric Chen

TI__Mastermind 22235 points

Hi Eric,

I have not get any feedback from the end customer, we could close this ticket for now and I could reopen it or create a related question if anything posted from customer side.

Thanks and regards,

Cherry

0 Eric Chen over 2 years ago in reply to Cherry Zhou

TI__Genius 9220 points

Thanks Cherry, I will close this thread for now.

Regards,
Eric C.

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MCF8316A: IIC communication