MC68HC08AS32 Datasheet, PDF (27/280 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Data Sheet — MC68HC08AS32
Section 2. Memory
2.1 Introduction
The CPU08 can address 64 Kbytes of memory space. The memory map, shown in
Figure 2-1, includes:
• 32,256 bytes of user ROM
• 1024 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
2.2 Input/Output (I/O) Section
Addresses $0000–$003F, shown in Figure 2-2, contain most of the control, status,
and data registers. Additional I/O registers have these addresses:
• $FE00, SIM break status register, SBSR
• $FE01, SIM reset status register, SRSR
• $FE03, SIM break flag control register, SBFCR
• $FE0C and $FE0D, break address registers, BRKH and BRKL
• $FE0E, break status and control register, BRKSCR
• $FE0F, LVI status register, LVISR
• $FE1C, EEPROM non-volatile register, EENVR
• $FE1D, EEPROM control register, EECR
• $FE1F, EEPROM array configuration register, EEACR
• $FFFF, COP control register, COPCTL
Table 2-1 is a list of vector locations.
MC68HC08AS32 — Rev. 4.1
Freescale Semiconductor
Data Sheet
27