s908ey8ad4cfjer Freescale Semiconductor, Inc, s908ey8ad4cfjer Datasheet - Page 25

• Manufacturer Part Number: s908ey8ad4cfjer
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 2
Memory
2.1 Introduction
The M68HC08 central processor unit (CPU08) can address 64 Kbytes of memory space. The memory
map, shown in
2.2 Unimplemented Memory Locations
Accessing an unimplemented location can cause an illegal address reset. In the memory map
(Figure
2.3 Reserved Memory Locations
Accessing a reserved location can have unpredictable effects on microcontroller unit (MCU) operation. In
the
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
Freescale Semiconductor
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Figure 2-1
16 Kbytes of FLASH memory, 15, 872 bytes of user space
512 bytes of random-access memory (RAM)
36 bytes of user-defined vectors
310 bytes of monitor routines in read-only memory (ROM)
1024 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
$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
$FF80; ICG trim value (optional), ICGT
2-1) and in register figures in this document, unimplemented locations are shaded.
and in register figures in this document, reserved locations are marked with the word
Figure
2-1, includes:
MC68HC908EY16 • MC68HC908EY8 Data Sheet, Rev. 10
Figure
2-2. and
Table 2-1
is a list of vector locations.
25