AT86RF233_14 Datasheet, PDF (90/225 Pages) ATMEL Corporation – Low Power, 2.4GHz Transceiver for ZigBee, RF4CE, IEEE

Register 0x2E (CSMA_SEED_1):
The CSMA_SEED_1 register is a control register for RX_AACK and contains a part of
the CSMA_SEED for the CSMA-CA algorithm.
Figure 8-5. Register CSMA_SEED_1.
Bit
7
6
0x2E
AACK_FVN_MODE
Read/Write
R/W
R/W
Reset value
0
1
Bit
3
2
0x2E
AACK_I_AM_
COORD
Read/Write
R/W
R/W
Reset value
0
0
5
AACK_SET_PD
R/W
0
1
CSMA_SEED_1
R/W
1
4
AACK_DIS_ACK
R/W
0
CSMA_SEED_1
0
CSMA_SEED_1
R/W
0
• Bit 7:6 - AACK_FVN_MODE
The register bits AACK_FVN_MODE control the ACK behavior dependent on FCF
frame version number within RX_AACK mode.
Table 8-11. AACK_FVN_MODE.
Register Bits
Value Description
AACK_FVN_MODE
0 Accept frames with version number 0
1 Accept frames with version number 0 or 1
2 Accept frames with version number 0 or 1 or 2
3 Accept frames independent of frame version number
Note: 1. AACK_FVN_MODE value one indicates frames according to IEEE 802.15.4–2006,
a value of three indicates frames according to IEEE 802.15.4–2003 standard.
The frame control field of the MAC header (MHR) contains a frame version subfield.
The setting of register bits AACK_FVN_MODE specifies the frame filtering behavior of
the Atmel AT86RF233. According to the content of these register bits the radio
transceiver passes frames with a specific frame version number, number group, or
independent of the frame version number.
Thus the register bits AACK_FVN_MODE defines the maximum acceptable frame
version. Received frames with a higher frame version number than configured do not
pass the frame filter and are not acknowledged.
The frame version field of the acknowledgment frame is set to zero according to
IEEE 802.15.4-2006, Section 7.2.2.3.1 Acknowledgment frame MHR fields.
90 _{MCU Wireless AT86RF233 [PRELIMINARY DATASHEET]}
Atmel-8351E-MCU_Wireless-AT86RF233_Datasheet_072014