User's Guide

Revision 1.0 Page 11 of 75
nRF24L01+ Preliminary Product Specification
2.2 Pin functions
Table 1. nRF24L01+ pin function
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. Active low
7 VDD Power Power Supply (+1.9V - +3.6V 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 Output (+1.8V) for the internal
nRF24L01+ Power Amplifier. Must be con-
nected to ANT1 and ANT2 as shown in Fig-
ure 29.
12 ANT1 RF Antenna interface 1
13 ANT2 RF Antenna interface 2
14 VSS Power Ground (0V)
15 VDD Power Power Supply (+1.9V - +3.6V DC)
16 IREF Analog Input Reference current. Connect a 22kΩ resistor
to ground. See Figure 29.
17 VSS Power Ground (0V)
18 VDD Power Power Supply (+1.9V - +3.6V DC)
19 DVDD Power Output Internal digital supply output for de-coupling
purposes. See Figure 29.
20 VSS Power Ground (0V)