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Nrf51822 ceaa - dec1 pin not connected

Hello,

I am using nrf51822 ceaa package.

What would happen if dec1 pin is not connected to a capacitor?

According to the datasheet, it is for power decoupling and is connected to a capacitor on recommended circuitry.

Would it cause any negative problem if it is left unconnected?

FYI, the power source is lithium polymer battery of less than 30mah. And input voltage to nrf51822 is 2.5v, lowered by a voltage regulator.

Thank you in advance!

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