User Manual

68
8111A–AVR–05/08
AT86RF231
7.2.6 Register Summary
The following registers are to be configured to control the Extended Operating Mode:
7.2.7 Register Description - Control Registers
Register 0x01 (TRX_STATUS):
The read-only register TRX_STATUS signals the present state of the radio transceiver as well
as the status of a CCA application. A state change is initiated by writing a state transition com-
mand to register bits TRX_CMD (register 0x02, TRX_STATE).
• Bit 7 - CCA_DONE
Refer to Section 8.5 “Clear Channel Assessment (CCA)” on page 94, not updated in Extended
Operating Mode.
• Bit 6 - CCA_STATUS
Refer to Section 8.5 “Clear Channel Assessment (CCA)” on page 94, not updated in Extended
Operating Mode.
• Bit 5 - Reserved
• Bit [4:0] - TRX_STATUS
The register bits TRX_STATUS signals the current radio transceiver status.
Table 7-14. Register Summary
Reg.-Addr Register Name Description
0x01 TRX_STATUS Radio transceiver status, CCA result
0x02 TRX_STATE Radio transceiver state control, TX_ARET status
0x04 TRX_CTRL_1
TX_AUTO_CRC_ON
0x08 PHY_CC_CCA CCA mode control, see Section 8.5.6
0x09 CCA_THRES CCA threshold settings, see Section 8.5.6
0x17 XAH_CTRL_1 RX_AACK control
0x20 - 0x2B Address filter configuration
- Short address, PAN-ID and IEEE address
0x2C XAH_CTRL_0 TX_ARET control, retries value control
0x2D CSMA_SEED_0 CSMA-CA seed value
0x2E CSMA_SEED_1 CSMA-CA seed value, RX_AACK control
0x2F CSMA_BE CSMA-CA back-off exponent control
Bit 7 6 5 4 3 2 1 0
+0x01 CCA_DONE CCA_STATUS Reserved TRX_STATUS TRX_STATUS
Read/Write R R R R R R R R
Reset Value 0 0 0 0 0 0 0 0