MON251 User's Guide

Theory of Operation

The MON251 Target Monitor requires proper setup and configuration of two distinct applications: the MON51 Target Monitor program and the µVision IDE Project and Debugger.

• MON251 is a program that resides on your target system. It may be programmed into EPROM, ROM, EEPROM, FLASH, non-volatile memory, or RAM. It communicates with the µVision Debugger and allows you to download programs (to von Neumann RAM), set breakpoints, watch memory areas and program objects, and so on. MON251 starts running when you reset your target system.
• The µVision Debugger begins a debugging session with the monitor by establishing serial communication between your PC (running µVision) and your target hardware (running MON51). The target program being debugged in µVision is transmitted to MON251 (via the serial interface) and is written into von Neumann memory (by MON251). Once the target program has been downloaded, you may proceed to step through it, set breakpoints, and so on.
  
  All operations performed in the µVision Debugger are communicated to MON251 using a proprietary serial protocol. MON251 serial commands are NOT ASCII text-based and cannot be easily viewed or created with a terminal program — the µVision Debugger and MON251 driver are required.