The embedded baseband protocol engine (Enhanced ShockBurst™) is based on packet communication and supports various modes from manual operation to advanced autonomous protocol operation. Internal FIFOs ensure a smooth data flow between the radio front end and the system’s MCU. Enhanced Shock-Burst™ reduces system cost by handling all the high speed link layer operations.

　　The radio front end uses GFSK modulation. It has user configurable parameters like frequency channel,output power and air data rate. nRF24L01+ supports an air data rate of 250 kbps, 1 Mbps and 2Mbps. The high air data rate combined with two power saving modes make the nRF24L01+ very suitable for ultra low power designs.

　　nRF24L01+ is drop-in compatible with nRF24L01 and on-air compatible with nRF2401A, nRF2402,nRF24E1 and nRF24E2. Intermodulation and wideband blocking values in nRF24L01+ are much improved in comparison to the nRF24L01 and the addition of internal filtering to nRF24L01+ has improved the margins for meeting RF regulatory standards.

　　Internal voltage regulators ensure a high Power Supply Rejection Ratio (PSRR) and a wide power supply range.

2、Features：

 • Radio
　　 Worldwide 2.4GHz ISM band operation
　　 126 RF channels
　　 Common RX and TX interface
　　 GFSK modulation
　　 250kbps, 1 and 2Mbps air data rate
　　 1MHz non-overlapping channel spacing at 1Mbps
　　 2MHz non-overlapping channel spacing at 2Mbps
• Transmitter
　　 Programmable output power: 0, -6, -12 or -18dBm
　　 11.3mA at 0dBm output power
• Receiver
　　 Fast AGC for improved dynamic range
　　 Integrated channel filters
　　 13.5mA at 2Mbps
　　 -82dBm sensitivity at 2Mbps
　　 -85dBm sensitivity at 1Mbps
　　 -94dBm sensitivity at 250kbps
• RF Synthesizer
　　 Fully integrated synthesizer
　　 No external loop filer, VCO varactor diode or resonator
　　 Accepts low cost ±60ppm 16MHz crystal
• Enhanced ShockBurst™
　　 1 to 32 bytes dynamic payload length
　　 Automatic packet handling
　　 Auto packet transaction handling
　　 6 data pipe MultiCeiver™ for 1:6 star networks
• Power Management
　　 Integrated voltage regulator
　　 1.9 to 3.6V supply range
　　 Idle modes with fast start-up times for advanced power management
　　 26μA Standby-I mode, 900nA power down mode
　　 Max 1.5ms start-up from power down mode
　　 Max 130us start-up from standby-I mode
• Host Interface
　　 4-pin hardware SPI
　　 Max 10Mbps
　　 3 separate 32 bytes TX and RX FIFOs
　　 5V tolerant inputs
• Compact 20-pin 4x4mm QFN package

3、Operational Modes:

　　You can configure the nRF24L01+ in power down, standby, RX or TX mode. This section describes these modes in detail.