14.8.39 CSMA_BE
The register CSMA_BE contains the backoff exponents for the CSMA-CA algorithm.
| Name: | CSMA_BE |
| Offset: | 0x2F |
| Reset: | 0x53 |
| Property: | - |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| MAX_BE[3:0] | MIN_BE[3:0] | ||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | |
Bits 7:4 – MAX_BE[3:0] MAX_BE
Maximum backoff exponent in the CSMA-CA algorithm.
| Value | Description |
|---|---|
| 0x5 |
Register bits MAX_BE defines the maximum backoff exponent used in the CSMA-CA algorithm to generate a pseudo random number for CCA backoff. Valid values are [0x8, 0x7, …, 0x0]. |
For details refer to [2] IEEE 802.15.4-2006, Section 7.5.1.4.
Bits 3:0 – MIN_BE[3:0] MIN_BE
Minimum backoff exponent in the CSMA-CA algorithm.
| Value | Description |
|---|---|
| 0x3 |
Register bits MIN_BE defines the minimum backoff exponent used in the CSMA-CA algorithm to generate a pseudo random number for CCA backoff. Valid values are [MAX_BE, (MAX_BE – 1), …, 0x0]. |