nRF51822Not Recommended for New Designs

Bluetooth Low Energy and 2.4 GHz SoC

The nRF51822 is a general purpose, ultra-low power SoC ideally suited for Bluetooth® Low Energy and 2.4 GHz proprietary wireless applications. It is built around the 32-bit ARM® Cortex™-M0 CPU with 256/128 KB flash and 32/16 KB RAM. The flexible 2.4 GHz radio supports Bluetooth Low Energy and 2.4 GHz proprietary protocols, such as Gazell.

It incorporates a rich selection of analog and digital peripherals that can interact directly without CPU intervention through the Programmable Peripheral Interconnect (PPI) system. Flexible GPIOs enables you to connect digital interfaces like SPI Master/slave, TWI Master and UART to any of the 31 GPIOs on the device.

Download nRF51822 product brief (PDF)

Download nRF51x22 QFAx Reference Layout v2.5 (ZIP)

Download nRF51x22 CxAx Reference Layout v1.4 (ZIP)

QFN486x6mm

WLCSP3.8x3.8mm

QFN486x6mm
WLCSP3.8x3.8mm

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Key Features

16 MHzCortex-M0
256/128 KBFlash,
32/16 KBRAM
2.4 GHz Transceiver
2 Mbps, 1 Mbps, 250 kbps
Bluetooth Low Energy
+4 dBm TX Power
128-bit AES CCM
UART, SPI, TWI

10-bit ADC

Documentation

Downloads

nRF51 Series SoCs

Overview

nRF51822 SoC

General purpose Bluetooth Low Energy SoC ideal for single chip solutions or as a connectivity device.

16 MHz Cortex-M0
256/128 KB Flash, 32/16 KB RAM
2.4 GHz Transceiver
2 Mbps, 1 Mbps, 250 kbps
Bluetooth Low Energy
+4 dBm TX Power
128-bit AES CCM
UART, SPI, TWI

10-bit ADC

nRF51422 SoC

General purpose multi-protocol ANT/Bluetooth Low Energy SoC. It is a nRF51822 with ANT support.

16 MHz Cortex-M0
256/128 KB Flash, 32/16 KB RAM
2.4 GHz Transceiver
2 Mbps, 1 Mbps, 250 kbps
Bluetooth Low Energy, ANT
+4 dBm TX Power
128-bit AES CCM
UART, SPI, TWI

10-bit ADC

nRF51824 SoC

nRF51824 is a AEC Q100 Grade 2 qualified Bluetooth Low Energy SoC. It is an auto grade nRF51822.

16 MHz Cortex-M0
256 KB Flash, 16 KB RAM
2.4 GHz Transceiver
2 Mbps, 1 Mbps, 250 kbps
Bluetooth Low Energy
+4 dBm TX Power
128-bit AES CCM
UART, SPI, TWI

10-bit ADC

AEC-Q100

SoftDevices

Compatible with nRF51822

SoftDevice S110

The S110 is a Bluetooth 4.1 qualified Peripheral protocol stack for the nRF51 Series.

Concurrent link as a Peripheral and Broadcaster
Configurable ATT Table
Privacy 1.1
Security mode 1 - Levels 1, 2 and 3
Custom UUID support
Support for concurrent multi-protocol with 2.4 GHz proprietary protocols

S120: Bluetooth 4.1

The S120 is a Bluetooth 4.1 qualified Central or Peripheral protocol stack for the nRF51 Series.

8 concurrent links as Central with Observer/Peripheral with Broadcaster

Configurable ATT Table

Privacy 1.1

Security mode 1 - Levels 1, 2 and 3

Custom UUID support

Support for concurrent multi-protocol with 2.4 GHz proprietary protocols

S130: Bluetooth 4.2

S130 is a Bluetooth 4.2 qualified Central and Peripheral protocol stack for the nRF51 Series

8 concurrent links as Central with Observer&Peripheral with Broadcaster

Configurable ATT Table

Privacy 1.1

Security mode 1 - Levels 1, 2, 3 and 4

Custom UUID support

Support for concurrent multi-protocol with 2.4 GHz proprietary protocols

LE Secure Connections

Relevant SDKs

Click to read more

nRF5 SDK

The Bluetooth LE and ANT software development kit

The nRF5 SDK is a high quality, thoroughly tested software development kit to accelerate your software development efforts for the nRF52 and nRF51 Series SoCs. It contains hundreds of useful firmware modules and examples to assist in building your application.

Development Kits

Evaluate, prototype and develop with nRF51822

nRF51 DK

The nRF51 DK is a Bluetooth Low Energy, ANT and 2.4 GHz proprietary development kit for the nRF51 Series SoCs. Develop applications for the nRF51822, nRF51422, nRF51824 and nRF51802 SoCs.

nRF51 Dongle

The nRF51 Dongle is a Bluetooth Low Energy, ANT and 2.4 GHz proprietary USB development dongle for the nRF51 Series SoCs. Develop applications for the nRF51822, nRF51422 and nRF51824 SoCs.

Power Profiler Kit

The Power Profiler Kit is an easy to use tool for measurement and optimization of power consumption for embedded solutions.

Related Applications

Click to learn more

Beacons

HID

Sports & fitness

Gaming

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VR & AR

table light cellphone sitting computer keyboard laptop phone monitor lit mouse car desk traffic surface water screen blue video game holding player desktop street remote

Wearables

Development Kits

Evaluate, prototype and develop with nRF51822

nRF51 DK

The nRF51 DK is a Bluetooth Low Energy, ANT and 2.4 GHz proprietary development kit for the nRF51 Series SoCs. Develop applications for the nRF51822, nRF51422, nRF51824 and nRF51802 SoCs.

nRF51 Dongle

The nRF51 Dongle is a Bluetooth Low Energy, ANT and 2.4 GHz proprietary USB development dongle for the nRF51 Series SoCs. Develop applications for the nRF51822, nRF51422 and nRF51824 SoCs.