Texas Instruments SimpleLink CC2620 Technical Reference Manual page 1523

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Byte Index Field Name
14–15 randomState
16 macMaxBE
17 macMaxCSMABackoffs
18 csmaConfig
19 NB
20 BE
21 remainingPeriods
22 lastRssi
23 endTrigger
24–27 lastTimeStamp
28–31 endTime
Byte Index Field Name
14 txOpt
15 payloadLen
16–19 pPayload
20–23 timeStamp
SWCU117C – February 2015 – Revised September 2015
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Table 23-61. IEEE 802.15.4 CSMA-CA Command Structure
Bits Bit Field Name
0–4 initCW
5 bSlotted
6–7 rxOffMode
Table 23-62. IEEE 802.15.4 TX Command Structure
Bits Bit Field Name
0 bIncludePhyHdr
1 bIncludeCrc
2
3–7 payloadLenMsb
Copyright © 2015, Texas Instruments Incorporated
Type Description
R/W The state of the pseudo-random generator
W The IEEE 802.15.4 MAC parameter macMaxBE
The IEEE 802.15.4 MAC parameter
W
macMaxCSMABackoffs
W The initialization value for the CW parameter
W 0 for nonslotted CSMA, 1 for slotted CSMA
0: RX stays on during CSMA backoffs
1: The CSMA-CA algorithm suspends the
receiver if no frame is being received
2: The CSMA-CA algorithm suspends the
W
receiver if no frame is being received, or after
finishing it (including auto ACK) otherwise
3: The CSMA-CA algorithm suspends the
receiver immediately during back-offs
The NB parameter from the IEEE 802.15.4
R/W
CSMA-CA algorithm
The BE parameter from the IEEE 802.15.4
R/W
CSMA-CA algorithm
The number of remaining periods from a
R/W
paused backoff countdown
R RSSI measured at the last CCA operation
Trigger that causes the device to end the
W
CSMA-CA operation
R Time of the last CCA operation
W Time parameter for endTrigger
Type Description
0: Find PHY header automatically.
W
1: Insert PHY header from the buffer.
0: Append automatically calculated CRC.
W
1: Insert FCS (CRC) from the buffer.
Reserved
Most significant bits of payload length. Must only be
W nonzero to create long nonstandard packets for test
purposes
W Number of bytes in the payload
W Pointer to payload buffer of size payloadLen
R Timestamp of transmitted frame
IEEE 802.15.4
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Radio