The typical application circuit diagram of nRF401

Published:2011/6/27 5:12:00 Author:Ecco | Keyword: typical application | From:SeekIC

UDD uses +3 V supply. The R1, JT, C1 and C2 constitute the crystal circuit, and C3, C4 and R2 form the loop filter. R3 is the power set resistor. C5 is the power supply decoupling capacitor; C6 and C7 are noise reduction capacitors. DIN, DOUT terminals are respectively connected MCU TXD (serial output), RXD (serial input) sides. To simplify the circuit, nRF401 μC can be combined with a crystal oscillator circuit, the circuit is shown as below. X1, X2 are respectively μC crystal input end and output end, the resulting crystal frequency is directly sent to the XC2 side of nRF401.



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