NRF52810-QFAA-R datasheet(285/483 Pages) NORDIC

285 / 483 page

Peripherals

6.14 RADIO — 2.4 GHz radio

The 2.4 GHz radio transceiver is compatible with multiple radio standards, such as 1 Mbps and 2 Mbps

Bluetooth® low energy, as well as Nordic's proprietary 1 Mbps and 2 Mbps modes of operation.

EasyDMA in combination with an automated packet assembler and packet disassembler, and an

automated CRC generator and CRC checker, makes it very easy to configure and use the RADIO. See RADIO

block diagram on page 285 for details.

RADIO

2.4 GHz

receiver

2.4 GHz

transmitter

RSSI

EasyDMA

Dewhitening

Whitening

IFS

control unit

CRC

Address

match

Bit counter

RAM

Payload

PACKETPTR

Packet

disassembler

Packet

assembler

Device

address

match

Packet synch

Payload

MAXLEN

ANT1

Figure 57: RADIO block diagram

The RADIO includes a device address match unit and an interframe spacing control unit that can be utilized

to simplify address white listing and interframe spacing respectively, in Bluetooth® Smart and similar

applications.

The RADIO also includes a received signal strength indicator (RSSI) and a bit counter. The bit counter

generates events when a preconfigured number of bits have been sent or received by the RADIO.

6.14.1 EasyDMA

The RADIO peripheral uses EasyDMA for reading of data packets from and writing to RAM, without CPU

involvement.

As illustrated in RADIO block diagram on page 285, the RADIO's EasyDMA utilizes the same PACKETPTR

on page 300 for receiving and transmitting packets, and this pointer can only point to the Data RAM

region. See Memory on page 15 for more information about the different memoryregions.

The DISABLED event indicates that the EasyDMA has finished accessing the RAM.

The structure of a radio packet is described in detail in Packet configuration on page 286. The data that

is stored in Data RAM and transported by EasyDMA consists of the following fields:

• S0

• LENGTH

• S1

• PAYLOAD

In addition, a static add-on is sent immediately after the payload.

The size of each of the above fields in the frame is configurable, and the space occupied in RAM depends

on these settings. A size of zero is possible for any of the fields, it is up to the user to make sure that the

resulting frame complies with the RF protocol chosen. For the field sizes defined in bits, the occupation

4430_161 v1.0

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