Eight-digit compatible C51 instruction set microcontroller

Abstract

The invention relates to a 8 bit compatible C51 index microcontroller which comprises a 8 bit high speed arithmetic logic component module, an arithmetic logic selection module, a 8x8 bit multiplication/division device, an internal data storage, a register interface module, a special function register, an index execution/direction register, an index state device, a breaking controller module, an index decoder, a program storage unit, a timer/counter module, an external port module, two serial interface modules, three 16 bit timers and one 16 bit watchdog timer; when the internal index is operated, the clock cycle used for each machine cycle is increased from the original twelve clock cycles to two clock cycles, the index operation speed can reach to six times of the prior 51 singlechip, the operation power consumption can be largely reduced, the function is complete, the performance is ideal, a wide application foreground can be obtained.

Description

technical field [0001] The invention relates to the field of semiconductor integrated circuit design, in particular to a microcontroller (MCU, Micro Control Unit). Background technique [0002] 51 single-chip microcomputer is a commonly used microcontroller, and it is one of the most widely used single-chip microcomputers in the market. Because of its simple and clear instructions, powerful functions, and a wide range of applications, it has an extremely wide range of applications in different production and control fields. [0003] The machine cycle of the traditional 51 single-chip microcomputer is 12 clock cycles, the operating frequency is low, and the instruction execution speed is slow; at the same time, there are few peripheral modules, the memory cannot be repeatedly erased, there is no system programming (ISP, In systemProgram) mode, application programming (IAP, In application Program) mode, online debugging is not available. Contents of the invention [0004] I...

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Problems solved by technology

[0003] The machine cycle of the traditional 51 single-chip microcomputer is 12 clock cycles, the operating frequency is low, and the instruction execution speed is slow; at the same time, there are few

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