AT86RF232-ZX datasheet(46/175 Pages) ATMEL

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8321A–MCU Wireless–10/11

AT86RF232

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.

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

registers 0x20 – 0x2B

 Configure RX_AACK properties

registers 0x2C, 0x2E

Handling of Frame Version Subfield

Handling of Pending Data Indicator

Characterize as PAN coordinator

Handling of Slotted Acknowledgement

 Additional Frame Filtering Properties

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 registers. 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.

TX_ARET configuration steps:

 Leave register bit TX_AUTO_CRC_ON = 1 register 0x04, TRX_CTRL_1

 Configure CSMA-CA

MAX_FRAME_RETRIES

MAX_CSMA_RETRIES

CSMA_SEED

registers 0x2D, 0x2E

MAX_BE, MIN_BE

 Configure CCA (see Section 8.5)

MAX_FRAME_RETRIES (register 0x2C, XAH_CTRL_0) defines the maximum number

of frame retransmissions.

The register bits MAX_CSMA_RETRIES (register 0x2C, XAH_CTRL_0) configure the

number of CSMA-CA retries after a busy channel is detected.

The register bits CSMA_SEED (registers 0x2D, 0x2E) define a random seed for the

back-off-time random-number generator in the Atmel AT86RF232.

The register bits MAX_BE and MIN_BE (register 0x2F, CSMA_BE) set the maximum

and minimum CSMA back-off exponent (see [1]), respectively.

AT86RF232-ZX Datasheet(PDF) 46 Page - ATMEL Corporation

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