MC68HC08AS20 Datasheet, PDF (39/386 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Advance Information — MC68HC08AS20
Section 2. Memory Map
2.1 Contents
2.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
2.3 Input/Output (I/O) Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
2.2 Introduction
The CPU08 can address 64 Kbytes of memory space. The memory
map, shown in Figure 2-1, includes:
• 20,480 bytes of user ROM
• 640 bytes of RAM
• 512 bytes of EEPROM
• 36 bytes of user-defined vectors
• 224 bytes of monitor ROM
These definitions apply to the memory map representation of reserved
and unimplemented locations.
• Reserved — Accessing a reserved location can have
unpredictable effects on MCU operation.
• Unimplemented — Accessing an unimplemented location
causes an illegal address reset if illegal address resets are
enabled.
MC68HC08AS20 — Rev. 4.1
Freescale Semiconductor
Advance Information
39