Why is it that the machine cycle of the STC89C52 microcontroller is 12 clocks, while the STC15W401AS only uses one T?

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Why is it that the machine cycle of the STC89C52 microcontroller is 12 clocks, while the STC15W401AS only uses one T? [Copy link]

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Why is it that the machine cycle of STC89C52, which is also a 51 microcontroller, is 12 clocks, while STC15W401AS only uses one clock? How does the latter do it?

led2015

STC15W401AS adopts a high-speed RISC architecture, making the CPU instruction set more compact. At the same time, it also adds technologies such as look-ahead instruction fetching in hardware to improve code execution efficiency and concurrent processing capabilities, thereby saving a lot of time for the entire system.

damiaa

12T 8051 clock cycle is like this

1T means that the above tasks are completed within one clock cycle.

How to do it: The CPU logic circuit can capture the start of the system cycle, and then generate some actions to fetch instructions, execute instructions (in several stages of time-sharing), etc. to realize the operation of instructions. This is related to the working principle of the CPU.

For more details, you can look at the system clock section of the manual of these chips.