Data Sheet

Revision 2.0 Page 44 of 74
nRF24L01 Product Specification
7.10 Compatibility with ShockBurst™
The nRF24L01 can have the Enhanced ShockBurst™ feature disabled in order to be backward compatible
with the nRF2401A, nRF24E1, nRF2402 and nRF24E2.
Disabling the Enhanced ShockBurst™ features is done by setting register EN_AA=0x00 and the ARC = 0.
In addition, the nRF24L01 air data rate must be set to 1Mbps.
7.10.1 ShockBurst™ packet format
The ShockBurst™ packet format is described in this chapter. MSB to the left.
Figure 22. A ShockBurst™ packet compatible with nRF2401/nRF2402/nRF24E1/nRF24E2 devices.
The ShockBurst™ packet format has a preamble, address, payload and CRC field that is the same as in
the Enhanced ShockBurst™ packet format described in section 7.3 on page 25.
The differences between the ShockBurst™ packet and the Enhanced ShockBurst™ packet are:
• The 9 bit Packet Control Field is not present in the ShockBurst™ packet format.
• The CRC is optional in the ShockBurst™ packet format and is controled by the EN_CRC bit in the
CONFIG register.
Preamble 1 byte Address 3-5 byte Payload 1 - 32 byte
CRC 1-2
byte