4.2 Wake-up Control

In most applications, the UHF device from Microchip acts as a peripheral, controlled from central device. The central must handle the Wake-up source, to ensure proper conditions for the RF device. With this approach, proper supply conditions are present prior to the UHF part activation. Another advantage of this approach is that the start-up order is kept. The UHF device can operate with voltage down to 1.9-2.0V. That means, the UHF device can operate in a voltage range where the main μC is still not operative. Be sure to maintain control over the Wake-up to avoid unexpected effects in such situations.