This paper introduces the main features of PL3105 and its carrier communication principle, and analyzes the software design method for carrier communication applications. Keywords PL3105 Direct sequence spread spectrum carrier communication Software design Introduction With the rapid development of embedded systems and integrated circuit technology, the (programmed in ISP mode) has a built-in low-power real-time clock. At the same time, it integrates perfect voltage monitoring, power-on, power-off reset, and watchdog circuits to ensure the reliability of the system when running in an industrial environment. The embedded carrier communication control unit enables the product to have the powerful functions of networking and remote communication on low-voltage power lines; it is an upgrade of the low-voltage power line carrier communication interface dedicated chip PL2101, which has strong resistance to in-band same-frequency smart meter applications. The dedicated chip designed has made great progress. Smart meters generally have CPU units, display units, standard industrial bus interfaces, A/D signal conversion, real-time clocks, watchdogs and other functions. After selecting the CPU, traditional smart meter equipment needs to configure complex functional chips and interface chips to complete display driving, external program storage, data storage interference capabilities, and high sensitivity. The embedded CPU controls the carrier communication by configuring registers, which is more convenient than the interface of the PL2101 chip and has higher reliability. And other interface chips that require many functions lead to the size of the instrument...
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