TPS65916EVM: Unable to use EVM's I2C connection TPS659162

Dan,

Hi, can you verify that this EVM has all the correct jumpers populated? See the user guide (Figure 1) for assistance how to populate the jumpers: www.ti.com/.../sliu021.pdf

It looks like you may be missing at least one. Let me know if this resolves your I2C communication issue.

Thanks,
Nastasha

Dear Nastasha,

I verified that the EVM board is the correct jumper, but it still doesn't start.
I currently have a few questions:
Can I separately control the TPS659162 on different boards through the EVM?
If this is feasible, what changes will my jumper do?

Currently I only connect the SDA and SCL of the TPS659162 to the EVM.

Thanks,
Dan

Dan,

You should be able to control the TPS659162 on another board. You would need SDA, SCL, and GND connections between both boards. Please add a ground connection. Also, can you scope the SDA and SCL lines to see what is being sent to the device.

Thanks,

Nastasha

Dear Nastasha,

A new problem has occurred, as shown in the picture.

I looked at the EVM information. I think that J26 has no other effect than letting GPIO5 have voltage, and GPIO5 in my other board TPS659162 already uses a pull-up resistor with a voltage.

I have measured the voltage on both the GPIO5 and RESET_OUT on the TPS659162 board.

Thanks,

Dan

Dan,

Can you please take scope shots of VCCA, VRTC, I2C_SCL, and I2C_SDA?

Thanks,

Nastasha

Dear Nastasha,

This is my picture file.

In addition, PDF is all the waveforms measured by my board.

q&a.pdf

Thanks,

Dan

Dan,

Can you verify that J7 and J10 have jumpers populated?

Also, are you taking measuring I2C_SDA from either TP7 or J12 (pin 2)?

And are you taking I2C_SCL from either TP6 or J9 (pin2)?

Thanks,

Nastasha