1.  About nRF51822

nRF51822 is a highly flexible SoC with multiplefunctionalities and protocols, it is suitable for BLE and 2.4GHz wirelessapplications. This SoC is a MCU based on ARM Cortex M0, it has a flash of256KB/128KB and RAM of 32KB/16KB. 2.4GHz RF supports BLE and nRF24L series.
Applicable fields: cellphone accessories, wearableelectronics, wireless charging monitoring, PC peripherals, consumerelectronics, remote controllers, smart home, intelligent RFID, toys andelectronic games & etc.

1.1  Chip characteristics

Single chip, highly flexbile 2.4GHz multiple-protocoldevice
32bit ARM Cortex M0 CPU
256KB/128KB flash + 32KB/16KB RAM
BLE protocol stack
Thread-safety and runtime protection
Event-driven API support
nRF24L series compatible with air link
Three air rates: 2Mbps, 1Mbps and 250Kbps
+4dBm output power
-93dBm sensitivity, BLE
Flexible power management system
Configurable I/O
Operating temperature: -40℃ to +105℃

2. About nRF52810

nRF52810 is a high-performance multi-protocol SoC supporting BLE5.0, ANT and 2.4GHz. This SoC provides support to BLE5.0, its core adopts ARM Cortex M4, it features 192KB flash and 24KB RAM, which enables it applicable for more advanced applications. It is outstanding even in low power consumption applications.
Applicable fields: BLE5.0 connection processor, industrial sensors & actuator, wearable electronics, smart home sensors, computer peripherals, sports and fitness sensors, smart watch, interactive games, building automation & etc.

2.1 Chip characteristics

Single chip, highly flexible 2.4GHz multi-protocol SoC
32bit ARM Cortex-M4 processor
Voltage: 1.7V to 3.6V
192KB flash + 24KB RAM
Support concurrent BLE/ANT protocol operation
+4dBm output power-96dBm sensitivity, BLE
Thread-safety and runtime protection
Event-driven API support
nRF24L & nRF24AP series compatible with air link
Two air rates: 2Mbps & 1Mbps
Automatic power management system
Configurable I/O
1 master/slave SPI
1 xTWI (I2C)
UART (RTS/CTS)
1 PWM (4 channels)
AES HW encryption
8-channel 10/12bit ADC
QDEC
64-level analog comparator
Real-time clock (RTC)
Digital microphone interface (PDM)
3. About nRF52832
nRF52832 is highly flexible and super low consumption multi-protocol SoC supporting BLE5.0, ANT and 2.4GHz wireless applications. Its core adopts ARM Cortex M4, it features 512KB flash and 64KB RAM. 2.4GHz transceiver supports BLE, ANT and special 2.4GHz protocol stack, nRF51 and nRF24L series are compatible.
Applicable fields: IoT, wearable electronics, smart home sensors, computer peripherals, voice-control remote controller, health monitoring products, smart watch, building automation & etc.
3.1 Chip characteristics
Single chip, highly flexible 2.4GHz multi-protocol SoC
32bit ARM Cortex-M4F processor
1.7V to 3.6V operating voltage
512KB flash + 64KB RAM
Support concurrent BLE/ANT protocol operation
+4dBm output power
-96dBm sensitivity, BLE
Thread-safety and runtime protection
Event-drive API support
nRF24L & nRF24AP compatible with air link
Two air rates: 2Mbps, 1Mbps
Automatic power management system
Configurable I/O
3 xMaster/Slave SPI
2 xTWI (I2C)
UART (RTS/CTS)
AES HW encryption
12bit ADC
Real-time clock (RTC)
Digital microphone interface (PDM)

4. About nRF52840
nRF52840 is an advanced multi-protocol SoC, it is very suitable for BLE wireless applications. nRF52840 adopts 32bit ARM Cortex M4F processor, 1MB flash and 256KB RAM. nRF52840 2.4GHz wireless transceiver supports BLE, ANT, 802.15.4 and 2.4GHz special protocol. It supports 2Mbps and 1Mbps BLE and BLE5.0 500Kbps and 125Kbps. It supports automatic measuring of high definition RSSI so as to reduce CPU workload.
Applicable fields: High-end wearproof devices, wearable safe payment, VR/AP system, smart home sensor network, smart city sensor network, high performance HID controller, IoT sensor network, smart lock and intelligent lighting network & etc.
4.1 Chip characteristics
High grade single chip, 2.4GHz multi-protocol SoC
32bit ARM Cortex-M4F processor
1.7V to 3.6V operating voltage
1MB flash + 256KB RAM
BLE5.0 supports remote and high throughput
802.15.4 radio support
SoC NFC
PPI programmable peripheral interconnecting
Automatic power management system
Configurable I/O
48 x GPIO
1 x QSPI
4 x Master/Slave SPI
2 x TWI (I2C)
I2S connector
2 x UART
4 x PWM
USB 2.0 controller
ARM TrustZone CryptoCell-310 encryption and safety module
AES 128bit ECB/CCM/AAR hardware accelerator
Digital microphone interface (PDM)
QDEC
12bit ADC
Low power comparator
Compatible with nRF52, nRF51 and nRF24.

5. Solution contrast

6.Conclusion
During the era of new technologies such as IoT, BLE devices emerges vigorously, nowadays, most cellphones support BLE5.0, such as Huawei and MI Bluetooth speakers, speed meter and cardiotachometer on bicycle,Bluetooth system in automobiles, Bluetooth earphones, Bluetooth walky-talkies & etc. Not only NORDIC but also TI is developing Bluetooth chips. When developing products, users are recommended to select mature and reliable modules so as to minimize development period and cost Ebyte has such BLE module E104-BT51 based on CC2640R2F, Meanwhile, Ebyte has the E73-2G4M04S1BX based on nRF52832, please download the datasheet from our website.From the development trend of IoT, BLE will be applied in more and more devices to create a real IoTempire by connecting physical devices.