Why Vccd should tie together in cy8c3866axi-40?

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Anonymous
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HeLi_263931
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        Because otherwise current might flow through the PSoC3. Given that the internal paths have a higher resistance, this can lead to voltage drops high enough to create brownouts for some components.   
So the rule is: if it is stated that one should connect these pins, one should better do it...   
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ETRO_SSN583
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These might help -

   

 

   

www.cypress.com/

   

 

   

www.cypress.com/

   

 

   

Regards, Dana.

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ETRO_SSN583
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Forgot to add reason behind this I would venture is to keep parasitic semiconductor

   

devices from turning on due to a differential between digital power domains.

   

 

   

Regards, Dana.

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