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Tool/software:
Hi Experts,
I would like to inquire about the UCD3138A64, which features two PMBus/I2C interfaces supporting both master and slave modes. Could you kindly share any available source code or examples that demonstrate the use of both PMBus interfaces as slaves?
Alternatively, are both interfaces using the same source code, with only the registers differing (e.g., PMBus1Regs and PMBus2Regs)?
Is there any restriction about using both PMBus interfaces as slaves at the same time?
Thank you for your assistance, and I look forward to your response.
Hello Jack,
The UCD3138A64 will use the same header files for both the PMBus and the I2C. You can view this E2E post for an PMBus slave example:https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/776547/ucd3138-questions-of-pmbus.
Yes, the registers are the same for both the PMBus1Regs and PMBus2Regs.
You can view our application note "UCD3138 – Responding to Multiple PMBus Slave Addresses": https://www.ti.com.cn/cn/lit/an/slua758/slua758.pdf.
Regards,
Jonathan Wong