Single-chip microcomputer peripheral atomic operation control method and system and single-chip microcomputer

The invention discloses a single-chip microcomputer peripheral atomic operation control method and system and a single-chip microcomputer. The method comprises the steps that whether peripheral atomic operation is executed or not is determined; when the peripheral atomic operation needs to be executed, an atomic address decoding result is obtained, and a certain peripheral register of the peripheral register group is selected to be subjected to write operation according to the atomic address decoding result; and selecting atomic operation data according to the atomic address decoding result, and writing the atomic operation data into the current peripheral register. By executing the peripheral atomic operation on the peripheral register, faster read-write operation can be implemented on the peripheral register, the execution efficiency of a CPU (Central Processing Unit) is improved, the power consumption of a single chip microcomputer is reduced, and meanwhile, the operation on the peripheral register can be