Address
0x03
Description
The SETUP_AW register is used to configure the address width.
Contents
This table is copied from the nRF24L01 product specification (page 53).
| Name |
Bit |
Reset Value |
Type | Description |
| Reserved | 7 | 0 | R/W | Only ‘0’ allowed |
| Reserved | 6 | 0 | R/W | Only ‘0’ allowed |
| Reserved | 5 | 0 | R/W | Only ‘0’ allowed |
| Reserved | 4 | 0 | R/W | Only ‘0’ allowed |
| Reserved | 3 | 0 | R/W | Only ‘0’ allowed |
| Reserved | 2 | 0 | R/W | Only ‘0’ allowed |
| AW | 1:0 | 11 | R/W | RX/TX Address field width ’00’ – Illegal ’01’ – 3 bytes ’10’ – 4 bytes ’11’ – 5 bytes LSByte is used if address width is below 5 bytes |
Comments
The software driver uses 5-byte addresses by default. This reduces the payload data rate because it makes the packet header longer, but it reduces the likelihood of address collisions on the noisy 2.4 GHz ISM band.
Every radio on the network must use the same address width.