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AT86RF231
7.2.2
Configuration
The use of the Extended Operating Mode is based on Basic Operating Mode functionality. Only
features beyond the basic radio transceiver functionality are described in the following sections.
For details on the Basic Operating Mode refer to Section 7.1 “Basic Operating Mode” on page
33 .
When using the RX_AACK or TX_ARET modes, the following registers needs to be configured.
RX_AACK configuration steps:
? Short address, PAN-ID and IEEE address
? Configure RX_AACK properties
– Handling of Frame Version Subfield
– Handling of Pending Data Indicator
– Characterize as PAN coordinator
– Handling of Slotted Acknowledgement
? Additional Frame Filtering Properties
registers 0x20 - 0x2B
registers 0x2C, 0x2E
registers 0x17, 0x2E
– Promiscuous Mode
– Enable or disable automatic ACK generation
– Handling of reserved frame types
The addresses for the address match algorithm are to be stored in the appropriate address reg-
isters. Additional control of the RX_AACK mode is done with register 0x17 (XAH_CTRL_1) and
register 0x2E (CSMA_SEED_1).
As long as a short address has not been set, only broadcast frames and frames matching the
IEEE address can be received.
Configuration examples for different device operating modes and handling of various frame
types can be found in Section 7.2.3.1 “Description of RX_AACK Configuration Bits” on page 54 .
TX_ARET configuration steps:
? Leave register bit TX_AUTO_CRC_ON = 1
? Configure CSMA-CA
– MAX_FRAME_RETRIES
– MAX_CSMA_RETRIES
– CSMA_SEED
– MAX_BE, MIN_BE
register 0x04, TRX_CTRL_1
register 0x2C, XAH_CTRL_0
register 0x2C, XAH_CTRL_0
registers 0x2D, 0x2E
register 0x2F, CSMA_BE
? Configure CCA (see Section 8.5 )
M A X _ F R A M E _ R E T R IE S ( re g i s te r 0 x 2 C) d e fi n e s t h e m a x i m u m n u m b e r o f f ra m e
retransmissions.
The register bits MAX_CSMA_RETRIES (register 0x2C) configure the number of CSMA-CA
retries after a busy channel is detected.
50
8111C–MCU Wireless–09/09
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