Data Sheet

Revision 2.0 Page 5 of 74
nRF24L01 Product Specification
7.5.1 Auto Acknowledgement................................................................... 29
7.5.2 Auto Retransmission (ART)............................................................. 29
7.6 Enhanced ShockBurst flowcharts ........................................................ 31
7.6.1 PTX operation.................................................................................. 31
7.6.2 PRX operation ................................................................................. 33
7.7 Multiceiver ............................................................................................ 35
7.8 Enhanced ShockBurstTM timing.......................................................... 38
7.9 Enhanced ShockBurstTM transaction diagram.................................... 40
7.9.1 Single transaction with ACK packet and interrupts.......................... 40
7.9.2 Single transaction with a lost packet ............................................... 41
7.9.3 Single transaction with a lost ACK packet ....................................... 41
7.9.4 Single transaction with ACK payload packet ................................... 42
7.9.5 Single transaction with ACK payload packet and lost packet.......... 42
7.9.6 Two transactions with ACK payload packet and the first
ACK packet lost ............................................................................... 43
7.9.7 Two transactions where max retransmissions is reached ............... 43
7.10 Compatibility with ShockBurst™ .......................................................... 44
7.10.1 ShockBurst™ packet format............................................................ 44
8 Data and Control Interface ....................................................................... 45
8.1 Features ............................................................................................... 45
8.2 Functional description .......................................................................... 45
8.3 SPI operation ....................................................................................... 45
8.3.1 SPI Commands ............................................................................... 45
8.3.2 SPI timing ........................................................................................ 47
8.4 Data FIFO ............................................................................................ 51
8.5 Interrupt................................................................................................ 52
9 Register Map.............................................................................................. 53
9.1 Register map table ............................................................................... 53
10 Peripheral RF Information ........................................................................ 59
10.1 Antenna output..................................................................................... 59
10.2 Crystal oscillator................................................................................... 59
10.3 nRF24L01 sharing crystal with an MCU............................................... 59
10.3.1 Crystal parameters .......................................................................... 59
10.3.2 Input crystal amplitude and current consumption ............................ 59
10.4 PCB layout and decoupling guidelines................................................. 60
11 Mechanical specifications........................................................................ 61
12 Ordering information ................................................................................ 63
12.1 Package marking ................................................................................. 63
12.2 Abbreviations ....................................................................................... 63
13 Glossary of Terms..................................................................................... 64
Appendix A - Enhanced ShockBurst™ - Configuration
and Communication Example.................................................................. 65
Enhanced ShockBurst™ Transmitting Payload ................................... 65
Enhanced ShockBurst™ Receive Payload .......................................... 65
Appendix B - Configuration for compatibility with nRF24XX................ 67
Appendix C - Carrier wave output power................................................ 68