Part Number: OPT8241-CDK-EVM
Hi there,
We are currently working on a board design which is based off the reference design of OPT8241-CDK-EVM. I have a few questions to further my understanding about the TPS65912x and OPT9221.
1) In the reference design of the evaluation board, I noticed OPT9221 ToF controller relies on the TPS65912x for power but the TPS65912x is using the SPI/I2C bus to communicate with the OPT9221. What is this communication mainly used for in this reference design – to set the output voltages of the LDOs and DCDC converters? How can we ensure that the voltage values we set in the LDO/DCDC converter registers for the TPS65912x remain unchanged since both devices are reliate on each other? Also, Is the OPT8241-CDK-EVM board using the default configuration values from the OTP memory to set the output voltages of the LDOs and DCDC converters upon power up and not changing them?
2) Secondly is how is the output power values and power sequence defined upon power up for the TPS65912x? I noticed the datasheet mentioned there is default configuration stored in OTP memory which is programmed by TI, but is there a way we can configure output power values and power sequencing upon start up on our own?
I still am trying to understand how the TPS65912x is used in the reference design of OPT8241-CDK-EVM so any help would be much appreciated. Thanks in advance.