UCD3138064: Can't communicate with the device when PMBus address is set to 0x7F

Jack Wang

Intellectual 320 points

Part Number: UCD3138064
Other Parts Discussed in Thread: UCD3138,

Hi,

- I can't communicate with the device when address is set to 0x7F.

- I tried to set it to some value else, 0x7E, it is fine, and 0x58, it is fine, too.

- What happened here? Is it a reserved address? Can I disable it?

Thank you.

over 7 years ago

0 Yitzhak Bolurian over 7 years ago

TI__Mastermind 18370 points

You are right.

0x7F is a reserved address and can not be used.

Unfortunaterly there is no way to disable the use of this address as a reserved address.

Regards,

0 Jack Wang over 7 years ago in reply to Yitzhak Bolurian

Intellectual 320 points

Hi again
- I found that communicate with UCD3138 via PMBus address 0x7F is fine. Which means UCD3138 doesn't have the reserved address, but UCD3138064 does?

Power management

Power management forum

UCD3138064: Can't communicate with the device when PMBus address is set to 0x7F