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NRF52820-QDAA-R Datasheet(PDF) 186 Page - Nordic Semiconductor |
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NRF52820-QDAA-R Datasheet(HTML) 186 Page - Nordic Semiconductor |
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186 / 437 page  Peripherals Note: The PCNF1.MAXLEN field includes the payload and the add-on, but excludes the size occupied by the S0, LENGTH, and S1 fields. This has to be taken into account when allocating RAM. If the payload and add-on length is specified larger than PCNF1.MAXLEN, the RADIO will still transmit or receive in the same way as before, except the payload is now truncated to PCNF1.MAXLEN. The packet's LENGTH field will not be altered when the payload is truncated. The RADIO will calculate CRC as if the packet length is equal to PCNF1.MAXLEN. Note: If PACKETPTR is not pointing to the Data RAM region, an EasyDMA transfer may result in a HardFault or RAM corruption. See Memory on page 15 for more information about the different memory regions. The END event indicates that the last bit has been processed by the RADIO. The DISABLED event is issued to acknowledge that an DISABLE task is done. 6.12.15 Registers Base address Peripheral Instance Description Configuration 0x40001000 RADIO RADIO 2.4 GHz radio Table 62: Instances Register Offset Description TASKS_TXEN 0x000 Enable RADIO in TX mode TASKS_RXEN 0x004 Enable RADIO in RX mode TASKS_START 0x008 Start RADIO TASKS_STOP 0x00C Stop RADIO TASKS_DISABLE 0x010 Disable RADIO TASKS_RSSISTART 0x014 Start the RSSI and take one single sample of the receive signal strength TASKS_RSSISTOP 0x018 Stop the RSSI measurement TASKS_BCSTART 0x01C Start the bit counter TASKS_BCSTOP 0x020 Stop the bit counter TASKS_EDSTART 0x024 Start the energy detect measurement used in IEEE 802.15.4 mode TASKS_EDSTOP 0x028 Stop the energy detect measurement TASKS_CCASTART 0x02C Start the clear channel assessment used in IEEE 802.15.4 mode TASKS_CCASTOP 0x030 Stop the clear channel assessment EVENTS_READY 0x100 RADIO has ramped up and is ready to be started EVENTS_ADDRESS 0x104 Address sent or received EVENTS_PAYLOAD 0x108 Packet payload sent or received EVENTS_END 0x10C Packet sent or received EVENTS_DISABLED 0x110 RADIO has been disabled EVENTS_DEVMATCH 0x114 A device address match occurred on the last received packet EVENTS_DEVMISS 0x118 No device address match occurred on the last received packet EVENTS_RSSIEND 0x11C Sampling of receive signal strength complete EVENTS_BCMATCH 0x128 Bit counter reached bit count value EVENTS_CRCOK 0x130 Packet received with CRC ok EVENTS_CRCERROR 0x134 Packet received with CRC error EVENTS_FRAMESTART 0x138 IEEE 802.15.4 length field received EVENTS_EDEND 0x13C Sampling of energy detection complete. A new ED sample is ready for readout from the RADIO.EDSAMPLE register. EVENTS_EDSTOPPED 0x140 The sampling of energy detection has stopped EVENTS_CCAIDLE 0x144 Wireless medium in idle - clear to send EVENTS_CCABUSY 0x148 Wireless medium busy - do not send 4463_156 v1.0 186 |
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