Connecting to the VDDD Pin for PSoC4

[SuSh_1535366]

Hello,

Some of the devices in PSoC4 have multiple VDDD pins.
(For example, CY8C4126AXI-S423)
Is it possible to supply power to only one of these pins and leave the other pins open?
If not, please let me know the reason.
(All VDDD pins are shorted inside the chip, right?

Regards,
Shimamura

[VenkataD_41 · Accepted solution]

Hello Shimamura-san,

Please note that the each and every VDDD pin exposed on the chip should be connected to the power supply. This is because these pins are not connected to each other inside PSoC (as per the hardware design).

Also, please note that for each VDDD pin connected to power supply, you should connect a pair of decoupling capacitors on them.  

Thanks and regards

Ganesh

[SuSh_1535366]

Hello Ganesh-san,

Thank you for you answer.