NRF52810-QCAA-R datasheet(289/483 Pages) NORDIC

289 / 483 page

Peripherals

The status of the CRC check can be read from the CRCSTATUS register after a packet has been received.

6.14.7 Radio states

The RADIO can enter a number of states.

The RADIO can enter the states described the table below. An overview state diagram for the RADIO is

illustrated in Radio states on page 289. This figure shows how the tasks and events relate to the RADIO's

operation. The RADIO does not prevent a task from being triggered from the wrong state. If a task is

triggered from the wrong state, for example if the RXEN task is triggered from the RXDISABLE state, this

may lead to incorrect behaviour. As illustrated in Radio states on page 289, the PAYLOAD event is always

generated even if the payload is zero.

State

Description

DISABLED

No operations are going on inside the radio and the power consumption is at a minimum

RXRU

The radio is ramping up and preparing for reception

RXIDLE

The radio is ready for reception to start

Reception has been started and the addresses enabled in the RXADDRESSES register are being monitored

TXRU

The radio is ramping up and preparing for transmission

TXIDLE

The radio is ready for transmission to start

The radio is transmitting a packet

RXDISABLE

The radio is disabling the receiver

TXDISABLE

The radio is disabling the transmitter

Table 59: RADIO state diagram

DISABLED

TXRU

TXIDLE

TXEN

Ramp-up

complete

/ READY

START

Packet sent / END

Address sent / ADDRESS

Payload sent [payload length >=0]

/ PAYLOAD

DISABLE

RXRU

RXIDLE

RXEN

Ramp-up

complete

/ READY

START

Packet received / END

Address received [Address match]

/ ADDRESS

Payload received [payload length >=0]

/ PAYLOAD

DISABLE

RXDISABLE

/ DISABLED

TXDISABLE

/ DISABLED

STOP

Figure 62: Radio states

6.14.8 Transmit sequence

Before the RADIO is able to transmit a packet, it must first ramp-up in TX mode.

See TXRU in Radio states on page 289 and Transmit sequence on page 290. A TXRU ramp-up

sequence is initiated when the TXEN task is triggered. After the radio has successfully ramped up it will

generate the READY event indicating that a packet transmission can be initiate. A packet transmission is

initiated by triggering the START task. As illustrated in Radio states on page 289 the START task can first

be triggered after the RADIO has entered into the TXIDLE state.

4430_161 v1.0

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