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Original question:

TPS65987D: i2c communication

TPS65987D: PD Controller will not communicate with USB MUX

Owen
Prodigy 175 points
Part Number: TPS65987D
Other Parts Discussed in Thread: TUSB1064

Hello,

I am using a TPS65987D and a TUSB1064 in I2C mode. I'm having an issue where the PD controller will not write to the TUSB1064.

If I use an Aardvark and Total Phase Control center. Setting the device address to 0xF and writing to the appropriate registers I get the expected results. But for some reason the PD controller will not write to the MUX.

I am using I2C3 and I have that enabled as a master, with the address set to 0xF. And GPIO 5/6 set to I2C mode.

Including all the I2C controller events set based on the App note.

https://www.ti.com/lit/an/slvae18/slvae18.pdf?ts=1655834011821

Thanks,

Owen