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S140SoftDevice

Feature-rich Bluetooth Low Energy protocol stack

SoftDevice S140 is a feature-rich Bluetooth® Low Energy protocol stack for the nRF52811, nRF52820, nRF52833 and nRF52840 System-on-Chips (SoCs). It supports up to 20 concurrent links in all roles (Broadcaster, Central, Observer, Peripheral). It is Bluetooth 5.1 qualified and supports the following Bluetooth features: high-throughput 2 Mbps, Long Range, Advertising Extensions and channel selection algorithm #2 (CSA #2).  The number of connections and bandwidth per connection are configurable, offering memory and performance optimization.

It is a complete stack with GAP, GATT, ATT, SM, L2CAP, and Link Layer. Both GATT Server and Client are supported. The broad feature set also includes Privacy 1.2, LE Data Packet Length Extension, configurable ATT MTU, L2CAP connection-oriented channels and LE Secure Connections.

Key features

Bluetooth 5.1 qualified

High-throughput 2 Mbps

Long Range

Advertising Extensions

CSA #2

LE Secure Connections

Privacy 1.2

Configurable ATT Table

Configurable ATT MTU

Custom UUID

LE Data Packet Length Extension

L2CAP connection-oriented channels

Concurrent multiprotocol support

All nRF52 Series protocol stacks

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nRF52 Series SoCs

Compatible with SoftDevice S140

nRF52840 SoC

Bluetooth 5.2 SoC supporting Bluetooth Low Energy, Bluetooth mesh, NFC, Thread and Zigbee

64 MHz Arm Cortex-M4 with FPU
1 MB Flash, 256 KB RAM
2 Mbps, 1 Mbps, Long Range
Bluetooth Low Energy
Bluetooth mesh
Thread, Zigbee
+8 dBm TX Power
128-bit AES CCM, Arm CryptoCell-310
UART, SPI, TWI, PDM, I2S, QSPI, PWM
12-bit ADC
NFC
USB 2.0

nRF52833 SoC

Bluetooth 5.2 SoC supporting Bluetooth Low Energy, Bluetooth mesh, Bluetooth Direction Finding, NFC, Thread and Zigbee

64 MHz Arm Cortex-M4 with FPU
512 KB Flash, 128 KB RAM
2 Mbps, 1 Mbps, Long Range
Bluetooth Low Energy
Bluetooth Direction Finding
Bluetooth mesh
Thread, Zigbee
+8 dBm TX Power
128-bit AES CCM
UART, SPI, TWI, PDM
HS-SPI, I2S, PWM
12-bit ADC
NFC
USB 2.0

nRF52820 SoC

Bluetooth 5.2 SoC with built-in USB and Bluetooth Low Energy, Bluetooth mesh, Thread and Zigbee support

64 MHz Arm Cortex-M4
256 KB Flash, 32 KB RAM
2 Mbps, 1 Mbps, Long Range
Bluetooth Low Energy
Bluetooth Direction Finding
Bluetooth mesh
Thread, Zigbee
+8 dBm TX power
128-bit AES
UART, SPI, TWI, QDEC
Full Speed USB 2.0
-40 to 105 °C extended temperature range 
1.7 to 5.5 V supply voltage

nRF52811 SoC

Bluetooth 5.2 SoC supporting Bluetooth Low Energy, Bluetooth Direction Finding and Thread

64 MHz Cortex-M4
192 KB Flash, 24 KB RAM
2.4 GHz transceiver
2 Mbps, 1 Mbps, Long Range
Bluetooth Low Energy
Bluetooth Direction Finding
Thread
+4 dBm TX power
128-bit AES

UART, SPI, TWI, PDM  
PWM
12-bit ADC