CPU (Central Processing Unit) and starting method of CPU

The embodiment of the invention discloses a CPU (Central Processing Unit), which is used for reducing the used space of a circuit board and is suitable for developing a PCB (Printed Circuit Board) to high integration and minimization so as to improve the using stability performance of the CPU. The method disclosed by the embodiment of the invention comprises an acquisition module, which is used for obtaining the times of clock signal generated by a clock generation module recorded by a counter module when a single plate is electrified, a register module, which is used for determining a target starting mode when the times reach a threshold, and a starting module, which is used for starting according to the target starting mode. The embodiment of the invention also provides a starting method of the CPU, which is used for reducing the used space of the circuit board and is suitable for developing the PCB to high integration and minimization so as to improve the using stability performance of the CPU.