Tool/software:
I've tried everything I can think of to connect to this i2c chip but cannot.
I have this plugged into an Raspberry Pi 4 for i2c bus and i'm using the "i2cdetect" utility to scan the bus. It finds every other device fine but not this one. I've tried swapping boards and chips and hot wiring things. Nothing.
I've tried VDD of 3.3v and 5v.
Pullups:
- NRST
- SDA, SCL (to 3.3v, added outside of this schematic. made no difference.)
- WDO
Checked not asserted:
- NRST is high
- NIRQ and WDE seemed high-ish
Monitored Signals: (tried with and without these connected)
- RS*'s are tied to gnd
- 5v, 3.3v, and 1.2v supplied to Mon2, 3, 4.
Floating:
- ESM
- WDE
- NIRQ
Addr:
- 30k to gnd (it's all I had that was close)
- Oddly the ADDR pin is measuring a much lower voltage than expected. (expected: 0.6v or so on addr pin, measuring practically 0)
PEC should be off by default with this part number: TPS389C0300CRTERQ1
Is there something I'm missing to enable i2c? Or is it possible that i'm just missing the initialization window and it goes into lockdown and stops responding?
I've tried writing code against the i2c datasheet, and pinging every address, but none respond.
Any ideas?