As everyone knows, now the Bluetooth low energy (BLE SOC) as a new generation of Bluetooth, with its advantages of low power consumption, it highlights the strong market competitiveness, NORDIC and TI is clearly the leader, and the nRF52832 that a low-power Bluetooth chip is welcomed by everyone. Next, we will explain why many Bluetooth module manufacturers choose nRF52832 from the following 5 aspects: power consumption, RF parameters, chip processing capabilities, memory and support protocols.
1. power consumption
The power consumption of the nRF52832 chip is about 5.0mA. It can be clearly seen from the table that the power consumption of nRF52832 is lower than that of the other models.

Table 1
2、Radiofrequency parameters
　　The transmission power and reception sensitivity are the radio frequency parameters that each Bluetooth module manufacturers pay more attention to. Higher transmission power and reception sensitivity can be more advantageous in the application of long distance transmission.
The next table is a comparison of the RF parameters of some of the latest chips：

Table 2
Note: +10dBm is the maximum transmission power allowed by the ETSI (European Telecommunications Standards Association).
3、Chip processing capability
　　M4F is Cortex-M4 adding a floating point operation unit, which can be used to cope with more computing requirements, and has higher performance and smaller volume. SKYLAB is the use of nRF52832 chip to produce Bluetooth BLE module. It is widely used in wearable devices.
　　Most of the original chip using ARM Cortex kernel, the Cortex-M0 kernel is a low-power kernel, it is suitable for sensor data acquisition, but in the operation algorithm is not very good. When you need to run BLE protocol stack in Cortex-M0 or 8051 kernel, it doesn't have much residual performance to do other things, and some complex peripherals can't connect.

Table 3
4、Memory
　　Usually the chip will provide Flash capacity of 128KB or 256KB. The real protocol stack is usually 70KB to 90KB size, so the space left to the application will not be too large. BLE applications are growing, and there are more and more things to deal with, so you need a larger RAM and a larger Flash.
　　NRF52832, with the 512KB Flash, is the BLE SoC that has the largest memory at present.
　　Usually the RAM of BLE SoC is only 16KB, and the 8KB to 12KB commonly used in the Bluetooth protocol stack is few.
　　And nRF52832 has the largest RAM of the current 64KB.

Table 4
5、Multi protocol support
　　The KW40Z published by Freescale is limited to processing power and Flash/RAM, which only supports BLE. The CC2650 of TI supports BLE, Zigbee, 6LowPAN, and RF4CE. Nordic's chips support the free protocol of BLE and ANT and 2.5Ghz. The wireless hardware provided by the chip is all about the same, and the difference lies in the use of different software.
　　BLE is the most popular wireless connection protocol, and multi protocol support certainly has a wider application space. But the coexistence "coexist" is also considered, which means that multiple protocols should be applied at the same time to ensure that the wireless protocols can not interfere with each other. Otherwise, a lot of electricity will be wasted on the retransmission of data.
The following table is a common protocol supported by BLE SoC chips：

Table 5
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