It is an embedded flash-type 8-bit high-performance 1T 8051 architecture microcontroller. The instruction set is fully compatible with the standard 80C51, with enhanced performance. It includes up to 18K bytes of main flash APROM for storing user code. The flash supports the In-Application Programming (IAP) function, which can achieve on-chip firmware updates. IAP can also configure any block of the user code array as non-volatile data storage, which can be written via IAP and read via IAP or the MOVC instruction. There is also an additional flash LDROM, usually used to store boot code for execution in In-System Programming (ISP). The LDROM size is configurable, up to 4K bytes. For ease of programming and verification, the flash allows...