PRELIMINARY PRODUCT SPECIFICATION
nRF24L01 Single Chip 2.4 GHz Radio Transceiver
(out of range), it may continue on the same frequency channel, but perform other
adjustments. (A dummy write to the RF_CH will clear the PLOS_CNT.)
Data Pipes
nRF24L01 configured as PRX can receive data addressed to 6 different data pipes in
one physical frequency channel. Each data pipe has its own unique address and can be
configured to have individual behavior.
The data pipes are enabled with the bits in the EN_RXADDR register. By default
only data pipe 0 and 1 are enabled.
The address for each data pipe is configured in the RX_ADDR_Px registers. Always
ensure that none of the data pipes have the exact same address.
Data pipe 0 has a unique 40 bit configurable address. Data pipes 1-5 share the 32 most
significant address bits and have only the LSByte unique for each data pipe. Figure 7
shows an example of how data pipes 0-5 are addressed. All pipes can have up to 40
bit address, but for pipe 1-5 only the LSByte is different.
Byte 4 Byte 3 Byte 2 Byte 1 Byte 0
Data pipe 0 (RX_ADDR_P0)
Data pipe 1 (RX_ADDR_P1)
0xE7
0xC2
0xD3
0xC2
0xF0
0xC2
0x35
0xC2
0x77
0xC2
Data pipe 2 (RX_ADDR_P2)
Data pipe 3 (RX_ADDR_P3)
Data pipe 4 (RX_ADDR_P4)
Data pipe 5 (RX_ADDR_P5)
0xC2
0xC2
0xC2
0xC2
0xC2
0xC2
0xC2
0xC2
0xC2
0xC2
0xC2
0xC2
0xC2
0xC2
0xC2
0xC2
0xC3
0xC4
0xC5
0xC6
Figure 7: Addressing data pipes 0-5
When a packet has been received at one of the data pipes and the data pipe is setup to
generate acknowledgement, nRF24L01 will generate an acknowledgement with an
address that equals the data pipe address where the packet was received.
Some configuration settings are common to all data pipes and some are individual.
The following settings are common to all data pipes:
•
•
•
•
•
•
•
CRC enabled/disabled (CRC always enabled when ESB is enabled)
CRC encoding scheme
RX address width
Frequency channel
RF data rate
LNA gain
RF output power
Nordic Semiconductor ASA - Vestre Rosten 81, N-7075 Tiller, Norway
Revision: 1.1
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Phone +4772898900
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Fax +4772898989
November 2005
Page 17 of 38
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