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DS100BR410: About SMBus and board settings

Part Number: DS100BR410


Hi, I have three questions about the features of DS100BR410.

(1) When PIN_MODE pin is connected to GND and fixed to Low, is it OK to leave BST_0-BST_2 pins open?

(2) If the SIGNAL DETECT function is not used, is it OK to leave SD_0-SD_3 open?

(3) I think VOD-SEL and DE_SEL can be set by the board connection and SMBus, respectively.If the board connection and SMBus control are mixed, which has priority?
Example)
Board setting: 600mVp-p,-3dB
SMBus :800mVp-p,0dB