2019-09-10 15:06:48 rfstar 138

        as early as 2016, ble 5.0 protocol was born, and ble 5.0 technology developed rapidly in the market. because of its longer communication distance and higher speed than ble 4.2, it was favored by many solution providers.

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        in order to adapt to the market, ti also launched cc2642r chip supporting ble 5.0. cc2642r is a chip based on arm ® cortex ® - m4f core, which can do floating-point operation with high precision and can collect accurate data from sensors. the core is advanced and has strong performance. now ti has begun to mass produce cc2642r. and rf-bm-2642b1, which uses ti cc2642r chip as the core, has been developed by shenzhen xinchida technology. its excellent chip core will bring new solutions to bluetooth applications.

        compared with cc2640 and cc2640r2f, the advantages of cc2642r are obvious, so what are the differences among the three chips?

        cc2640, cc2640r2f and cc2642r are all 2.4 ghz rf devices.

        the cc2640, cc2640r2f and cc2642r special radio controllers are arm ® cortex ® - m0, which can handle the low-level rf protocol commands stored in rom or ram, so it can ensure that the ultra-low power consumption and the low power consumption of the excellent flexibility device will not affect the rf performance, with excellent sensitivity and durability. but their main mcu is different.

        the cc2640 device contains a 48 mhz arm ® cortex ® - m3 core.

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        cc2640r2f device contains 48 mhz arm ® cortex ® - m3 core.

        cc2642r device contains a 48 mhz arm ® cortex ® - m4f core.

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        the three chips support different protocols. cc2640 supports ble 4.2 protocol, cc2640r2f supports ble 4.2 and ble 5.0 protocol, and cc2642r supports ble 4.2 and ble 5.0 protocol.

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        cc2640 has 128kb system programmable flash memory, up to 28kb system sram, of which 20kb is sram.

        cc2640r2f has 275kb non-volatile memory, including 128kb system programmable flash memory, up to 28kb system sram, of which 20kb is sram.

        cc2642r has 352kb system programmable flash memory, 256kb rom and 80kb sram.

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        in terms of the specific parameters of cc2640, cc2640r2f and cc2642r, cc2642r has been greatly upgraded compared with the previous generation. the programmable memory in the system is more than twice that of the previous generation, and sram has been greatly expanded. its rich memory space can well support the application of ble 5.0.

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        compared with cc2640, cc2640r2f also has some differences. under the ble 4.2-based protocol, the space cc2640r2f can provide is 80kbytes, while cc2640 is 31kbytes. while cc2640r2f supports ble 5.0, cc2640 only supports ble 4.2. cc2640r2f not only supports qfn encapsulation of pin to pin, but also adds a smaller chip level encapsulation of 2.7mm * 2.7mm.

        compared with the change of ble4. x in physical layer, ble 5.0 has a longer communication distance. theoretically, the effective transmission distance of ble 5.0 is 300 meters, while the former ble 4.2 is only 100 meters. but in practical application, the transmission distance of signal is also affected by the power of bluetooth device and antenna. for example, in order to save power and increase working time, whether bl 5.0 or bel 4.2 standard is adopted, the actual transmission radius of bluetooth audio is generally 10 meters.

        compared with ble 4.2, ble 5.0 has a higher communication rate, double the theoretical transmission rate, from 1mbps to 2mbps.

        however, they do not have both, which is not to say that they can realize long distance at the same time. in high-speed bluetooth communication, when realizing long distance, communication speed will be sacrificed, and when realizing high-speed rate, communication distance will also be sacrificed.

        in the application scenario of ble 5.0, cc2642r is rich in memory, and the excellent 48 mhz arm ® cortex ® - m4f core can help ble 5.0 develop rapidly in the field of internet of things. the rf-bm-2642b1 with ti cc2642r chip as the core will bring new solutions to bluetooth applications.