DS90UB940-Q1: I2C write access to DS90UB925 is not working through DS90UB940.

kyoman shim

Part Number: DS90UB940-Q1

Hi,

I faced to the problem as following.

I2C read/write access to DS90UB940 is working well.

I2C read access to DS90UB925 is working well except TX ID register(0xF0~0xF5).

I2C write access to DS90UB925 is not working.

What is the problem? Could tell me any suggestion, please.

Thanks.

0 Hamzeh Jaradat over 6 years ago

Hello,
please check register 0x05 [2] on the 925 if it is set or not. This bit is to disable remote write access

0 kyoman shim over 6 years ago in reply to Hamzeh Jaradat

Hello,

Read value of 0x5 on DS90UB925 is 0x00.

Anyway, I will try to debug more time.

Thank you.

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