The M8051EW expands upon the M8051W's impressive performance by incorporating on-chip debugging capabilities. This microcontroller core offers not only rapid execution but also integrates a JTAG debug port for compatibility with external debugging tools. Additionally, this core is designed with hardware breakpoints and instruction tracebacks, providing full read and write access across all register and memory locations. Such capabilities, together with its fast execution cycle, make it an ideal choice for designs requiring advanced debugging and real-time control.