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Question on DAC_RBIAS

Anonymous
Anonymous

Hi All,

 

I would like to ask about 6437’s DAC_RBIAS pin of VPBE.

 

 

 

 

Table 2-21 of SPRU345d describes this pin as should be connected to VSSA-1P8V when DAC is used, and in sheet 30 – Video Out of EVM6437 schematics it is actually connected to GND_DAC.

 

The question is does VSSA-1P8V require 1.8V as its corresponding voltage? In the schematics, it seems that the corresponding high voltage is DAC_3V3, which is 3.3V rather than 1.8V.

 

How should I understand this?

 

 

 

 

Thanks,

Zheng