Advanced multiprotocol support for lower-end of nRF52 series

March 23, 2020 //By Ally Winning
Nordic Semiconductor’s nRF52820 SoC is a fully-featured +8 dBm output power radio supporting all Bluetooth 5.2 features with high-temperature capability.
Nordic Semiconductor’s nRF52820 SoC is a fully-featured +8 dBm output power radio supporting all Bluetooth 5.2 features with high-temperature capability.

The nRF52820 Bluetooth 5.2 SoC is the sixth addition to Nordic’s nRF52 Series and is intended to provide an ultra-low-power Bluetooth LE, Bluetooth mesh, Thread, Zigbee, and 2.4-GHz proprietary lower-end wireless connectivity solution. nRF52820 supports all the features of Bluetooth 5, 5.1, and 5.2 including Long Range and high-throughput 2 Mbps, Direction Finding, LE Power Control, and LE Isochronous Channels. The SoC also includes a Full Speed (12 Mbps) USB 2.0 interface.

The SoC has a 64-MHz 32-bit Arm Cortex-M4 processor with 256 KB Flash and 32 KB RAM. When paired with an application MCU, the nRF52820's fully-featured multiprotocol radio and +8 dBm output power allows it to act as a network processor for gateways and smart home applications. The nRF52820 is qualified for operation from -40 to 105 °C.

In addition to the main supply regulators, the USB peripheral in the nRF52820 has a dedicated regulator for converting the 5-V VBUS signal to the 3.3 V required for the USB signalling interface, negating a need for an external regulator.

The nRF52820 features up to 18 GPIOs, as well as a range of analog and digital interfaces including an analog comparator, SPI, UART, TWI, and QDEC. The supply voltage ranges from 1.7 to 5.5-V, allowing the nRF52820 to be powered by coin-cells and rechargeable batteries.

The nRF52820 is supported by the S112 and S140 SoftDevices (Bluetooth 5.1-qualified protocol stacks), and the S122 (alpha version) SoftDevice. The S112 and S122 are memory-optimized peripheral and central stacks respectively, while the S140 is a feature-complete Bluetooth 5 protocol stack for central and peripheral, including Long Range and high-throughput 2 Mbps features.

Development with the nRF52820 is supported by Nordic's nRF5 SDK v16.0.0, with full nRF5 SDK support to follow in Q2 2020. The nRF52833 Development Kit (DK) can be used to emulate the nRF52820. The DK is a versatile single board development kit for Bluetooth LE, Bluetooth mesh, 802.15.4, Thread, Zigbee, and 2.4GHz


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