User Manual

8111A–AVR–05/08

AT86RF231

7.1.5 Register Description

A read access to TRX_STATUS register signals the current radio transceiver state. A state

change is initiated by writing a state transition command to register bits TRX_CMD (register

0x02, TRX_STATE). Alternatively a state transition can be initiated by the rising edge of pin 11

(SLP_TR) in the appropriate state.

This register is used for Basic and Extended Operating Mode, refer to Section 7.2 “Extended

Operating Mode” on page 47.

• Bit 7 - CCA_DONE

Refer to Section 8.5 “Clear Channel Assessment (CCA)” on page 94.

• Bit 6 - CCA_STATUS

Refer to Section 8.5 “Clear Channel Assessment (CCA)” on page 94.

• Bit 5 - Reserved

• Bit [4:0] - TRX_STATUS

The register bits TRX_STATUS signals the current radio transceiver status. If the requested

state transition is not completed yet, the TRX_STATUS returns

STATE_TRANSITION_IN_PROGRESS. Do not try to initiate a further state change while the

radio transceiver is in STATE_TRANSITION_IN_PROGRESS. State transition timings are

defined in Table 7-1 on page 42.

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