AT86RF212 datasheet(39/171 Pages) ATMEL

39 / 171 page

8168B-MCU Wireless-02/09

AT86RF212

Symbol

Block

Time, typ.

Time, max.

Comments

tTR24

PLL, TX

32 µs

PLL settling time TX

tTR25

RSSI

BPSK-20: 32 µs

BPSK-40: 24 µs

O-QPSK: 8 µs

RSSI update period in receive states, refer to section 6.4.2

tTR26

8 symbol periods

ED measurement period, refer to section 6.5

Different timing with High Data Rate Modes, see sections 6.5.5 and

7.1.4.3

tTR28

CCA

8 symbol periods

CCA measurement period, refer to section 6.6.2

tTR29

Random value

1 µs

Random value update period, refer to section 9.2.1

5.1.5 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 5.2.

Table 5-3. Register 0x01 (TRX_STATUS)

Bit

Name

CCA_DONE

CCA_STATUS

Reserved

TRX_STATUS[4]

Read/Write

Reset Value

Bit

Name

TRX_STATUS[3]

TRX_STATUS[2]

TRX_STATUS[1]

TRX_STATUS[0]

Read/Write

Reset Value

• Bit 7 – CCA_DONE

Refer to section 6.6

• Bit 6 – CCA_STATUS

Refer to section 6.6

• Bit 5 – Reserved

• Bit 4:0 – TRX_STATUS

The register bits TRX_STATUS signal 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 5-1.

Table 5-4. Radio Transceiver Status, Register Bits TRX_STATUS

Value

State Description

0x00

P_ON

TRX_STATUS

0x01

BUSY_RX

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