介绍几种cpuThe 8xC251SA/SB/SP/SQ improves on the MCS-51 architecture and peripheral features, introducing the advanced register based CPU architecture i.e., the MCS 251 microcontroller architecture. The register based CPU supports a 40-byte register file

uC/OS-II 􀂃 Micro-Controller Operating Systems, Version 2 􀂃 A very small real-time kernel. 􀂃 Memory footprint is about 20KB for a fully functional kernel. 􀂃 Source code is about 5,500 lines, mostly in ANSI