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NRF52810-QFAA-R Datasheet(PDF) 289 Page - Nordic Semiconductor |
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NRF52810-QFAA-R Datasheet(HTML) 289 Page - Nordic Semiconductor |
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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 RX 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 TX 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 TX TXEN Ramp-up complete / READY START Packet sent / END Address sent / ADDRESS Payload sent [payload length >=0] / PAYLOAD DISABLE RXRU RXIDLE RX 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 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 v1.0 289 |
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