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DS90UB940-Q1: Is there any way to reduce system power consumption with maintaining each I2C register values?

K.Yaita
Guru 29720 points
Part Number: DS90UB940-Q1
Other Parts Discussed in Thread: DS90UB925Q-Q1,

Hi Team,

My customer is designing his system to use DS90UB940-Q1 (Deserializer) with DS90UB925Q-Q1(Serializer).
I2C register of DS90UB940-Q1 can be accessed locally but that of DS90UB925Q-Q1 is accessed remotely through BCC from DS90UB940-Q1 in this case. 

Is there any way to reduce system (DS90UB940-Q1+DS90UB925Q-Q1) power consumption with maintaining each I2C register values?
I believe PDB=0 resets I2C register to default value, so would like to know if there is another way.

Best Regards,
Yaita / Japan disty