There are many application areas, such as intelligent instruments or instruments, automatic control equipment, household appliances, etc., which have low requirements for computing and control functions, and can achieve satisfactory control effects with simple control software, but for some volume The cost and energy consumption have strict application fields, and it is difficult for general control software to meet the corresponding control requirements. In order to meet the requirements of these application fields, a microcontroller has been developed through research. A single-chip microcomputer is an integrated circuit chip, which mainly utilizes a super-large-scale integrated circuit technology to have various functions such as a central processing unit CPU, a RAM, a ROM, an I/O, an interrupt system, and a timer. The function is concentrated on a tiny piece of silicon to form a complete microcomputer system
Msp430 series MCU is a new type of 16-bit MCU. The main feature is low power consumption and fast speed. The main development language is c. The development environment has an iar integrated development environment. Msp430 microcontroller has different series, there are f series, c series. For example, the f series msp40f135 indicates that the rom is a flash type. Commonly used is the f series 13 series 14 series. The 13 series are available in msp430f133 and msp430f135. The 14 series has msp430f149 and so on. The c51 microcontroller is rarely used now, and has been replaced by the s52 microcontroller.
The main difference is that their kernels are completely different.
The MSP430 core adopts RISC reduced instruction structure, and the whole code is small. According to the complexity level, the instruction is in the range of tens to hundreds, and the execution efficiency of the code is high. Many of the operations are for the reading and writing of the register to complete the setting of the function module. In progress.
51 belongs to the classic CISC complex instruction structure, the code is more, and with the increase of performance, the supplementary instructions are also increasing. The previous one hundred may have more than 200 now, and the code execution efficiency is not as good as the RISC structure.
Due to the above basic structural features, the RISC structure is more efficient and faster than the CISC structure at the same system frequency.
The MSP430 uses the RISC reduced instruction set to execute an instruction in a single clock cycle, the same crystal, 12 times faster than 51.
Other on-chip resources are also rich in MSP.
Overall, the MSP430 is powerful and fast, and these are obvious advantages over 51.
However, MSP430 is a mixed-signal processor. For many specific applications, many functions are not necessarily useful. If the speed requirement is not very high, 51 can also be used to demonstrate 51 low cost, rich development resources, convenient bit addressing, etc. advantage.
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