mc68hc908gr8vp Freescale Semiconductor, Inc, mc68hc908gr8vp Datasheet - Page 27

• Manufacturer Part Number: mc68hc908gr8vp
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 2
Memory Map
2.1 Introduction
The CPU08 can address 64K bytes of memory space. The memory map, shown in
2.2 Unimplemented Memory Locations
Accessing an unimplemented location can cause an illegal address reset if illegal address resets are
enabled. In the memory map
locations are shaded.
2.3 Reserved Memory Locations
Accessing a reserved location can have unpredictable effects on MCU operation. In the
in register figures in this document, reserved locations are marked with the word Reserved or with the
letter R.
2.4 Input/Output (I/O) Section
Most of the control, status, and data registers are in the zero page area of $0000–$003F. Additional I/O
registers have these addresses:
Data registers are shown in
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8K bytes of FLASH memory, 7680 bytes of user space on the MC68HC908GR8 or
4K bytes of FLASH memory, 4096 bytes of user space on the MC68HC908GR4
384 bytes of random-access memory (RAM)
36 bytes of user-defined vectors
310 bytes of monitor routines in read-only memory (ROM)
544 bytes of integrated FLASH burn-in routines in ROM
$FE00; SIM break status register, SBSR
$FE01; SIM reset status register, SRSR
$FE03; SIM break flag control register, SBFCR
$FE04; interrupt status register 1, INT1
$FE05; interrupt status register 2, INT2
$FE06; interrupt status register 3, INT3
$FE07; reserved FLASH test control register, FLTCR
$FE08; FLASH control register, FLCR
$FE09; break address register high, BRKH
$FE0A; break address register low, BRKL
$FE0B; break status and control register, BRKSCR
$FE0C; LVI status register, LVISR
$FF7E; FLASH block protect register, FLBPR
Figure
MC68HC908GR8 • MC68HC908GR4 Data Sheet, Rev. 7
(Figure
2-2, and
2-1) and in register figures in this document, unimplemented
Table 2-1
is a list of vector locations.
Figure
Figure 2-1
2-1, includes:
and
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