Typical application circuit of nRF401 single - chip RF transceiver

Published:2012/7/25 3:10:00 Author:Ecco | Keyword: Typical application, single - chip, RF transceiver | From:SeekIC

The nRF401 typical application circuit is shown as the figure. The UDD uses a +3 V power supply. The crystal oscillator circuit is composed of R1 , JT , C1 and C2; C3 , C4 and R2 form the loop filter. R3 can be used to set resistance for the power. C5 is the power decoupling capacitor, C6 and C7 are noise canceling capacitors. DIN and DOUT side are respectively connected the MCU's TXD port ( serial output ) , RXD port( serial input ). In order to simplify the circuit, nRF401 can connect with μC to be used as a crystal oscillator circuit, and it is shown as below. X1 and X2 are μC's crystal input and output ports, and the generating crystal frequency is sent directly to the XC2 side of nRF401.



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