P89LPC920/921/922 is a single-chip packaged microcontroller, suitable for many occasions requiring high integration and low cost. It can meet many performance requirements. P89LPC920/921/922 uses a high-performance processor structure, and the instruction execution time only takes 2 to 4 clock cycles. 6 times that of the standard 80C51 device. P89LPC920/921/922 uses many system functions, which greatly reduces the number of components and circuit board area and reduces the cost of the system.