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Part Number: TPS546C20A
[Test environment]1. We purchased "TPS546C20AEVM1-746" to use "PS546C20A".
2. We have successfully tested VOUT from 0.35V to 1.6V in the following environment. "TPS546C20AEVM1-746" - (USB-TO-GPIO) - "PC (FUSION_DIGITAL_POWER_DESIGNER)"
3. Next, "MCU (ATmega128A) Test Board" was connected instead of PC as in the following environment. "TPS546C20AEVM1-746" - (2 wire Cable) - "ATmega128A Test Board"
[Question]Q. We want to check only the PMBus communication test between "PS546C20A" in EVM and MCU (ATmega128A-i2C) Can I connect only "CLK" and "DATA" like the attached file for this? Or do I have to connect the other two lines (CNTL, SMBALRT)? (But we will not confirm until "VOUT" yet)
I think CNTL is only for manually disabling the output depending on the state of ON_OFF_CONFIG and is not needed to test the PMBus.
I think SMBALERT is just used like an interrupt to alert of fault conditions, and is also not needed to test the PMBus interface.
Only the 2 wire Data and CLK signals are needed.
Our team will verify this today.
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