Datasheet

PRELIMINARY PRODUCT SPECIFICATION
nRF24L01 Single Chip 2.4 GHz Radio Transceiver
Nordic Semiconductor ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone [phone] - Fax [phone]
Revision: 1.2 Page 3 of 39 March 2006
PIN FUNCTIONS
Pin Name Pin function Description
1 CE Digital Input Chip Enable Activates RX or TX mode
2 CSN Digital Input SPI Chip Select
3 SCK Digital Input SPI Clock
4 MOSI Digital Input SPI Slave Data Input
5 MISO Digital Output SPI Slave Data Output, with tri-state option
6 IRQ Digital Output Maskable interrupt pin
7 VDD Power Power Supply (+3V DC)
8 VSS Power Ground (0V)
9 XC2 Analog Output Crystal Pin 2
10 XC1 Analog Input Crystal Pin 1
11 VDD_PA Power Output Power Supply (+1.8V) to Power Amplifier
12 ANT1 RF Antenna interface 1
13 ANT2 RF Antenna interface 2
14 VSS Power Ground (0V)
15 VDD Power Power Supply (+3V DC)
16 IREF Analog Input Reference current
17 VSS Power Ground (0V)
18 VDD Power Power Supply (+3V DC)
19 DVDD Power Output Positive Digital Supply output for de-coupling purposes
20 VSS Power Ground (0V)
Table 3 nRF24L01 pin function
PIN ASSIGNMENT
nRF24L01
QFN20 4x4
VDD
VSS
ANT2
VSS
CE
1920
4
3
2
1
15
14
5
VDD_PA
ANT1
12
11
13
CSN
MISO
MOSI
VDD
18
IREFVSS
17 16
IRQ
DVDD
VSS
76 9 108
XC2
XC1
VDD
SCK
Figure 2 nRF24L01 pin assignment (top view) for a QFN20 4x4 package.