Design consultation cy8c4025azi-s413

[ReidWang]

I have a touch button scheme , which uses cy8c4025azi-s413 .
I did not connect the 21 pin（Vddd） when designing the hardware. At present, the project has been mass produced.
inquired about the impact of this design problem on the scheme.
1 does the design have to be changed?
2 what is the impact on the design?
3 if there is a risk, what is the risk and why?
4 PINS 21 and 39 are the same power pins. Are they directly connected internally?

[Roy_Liu · Accepted solution]

Hi

Recommend to change the design to have all Vddd pins connected to power supply though Vddds pins are connected internally. There is risk for such design, different Vddd pins power different function domains inside.