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Part Number: TPS659122EVM-081
We're under help our customer to debug the TPS659122 with Tof sensor (OPT8320) application.
They've feedback a problem about the voltage abnormal case when sending the code to call the register: 0x0Ah (DCDC3_OP), fail rate about 11/60 pcs and cant be duplicated
Through the I2C to call the DCDC Register memory map, it will get non-ack information, but get acknowledge OK when sending again. It always happened when set dcdc3_op this one.
We'd like to know is there anything suggestion to customer check their coding? or some point we could check again?
1. customer schematic
3. compare the I2C information between pass & fail status.
Since the NACK occurs just after the read/write request, I would check the previous write command. Maybe try swapping the order of your I2C instructions to see if the problem still occurs.
Let me know what results you find or any further questions you may have.
In reply to Nastasha:
In reply to Kay Chen53:
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