Keil™, An ARM® Company

C251 Development Tools

Memory Map

The following memory maps show which areas of the memory space are available for your program's use. If you do not use the MON51 or MON251 Target Monitor, practically the entire address space is available.

MON251 Memory Map

Address RangeDescription
00:0000h — 01:FFFFhAvailable User RAM
FE:0000h — FF:DFFFhUser program code.
FF:E800h — FF:FFFFhMonitor ROM
FF:E000h — FF:E3FFhDecoded User Address Space
FF:E400h — FF:E7FFExternal UART

MON51 Memory Map

Address RangeDescription
X:0000h — X:DFFFhvon Neumann RAM/ROM
Reserved for user program code — Mapped as CODE and XDATA.
C:E800h — C:FFFFhMonitor ROM
X:E000h — X:E3FFhDecoded User Address Space
X:E400h — X:E7FFhExternal UART