MC68HC705JP7 Datasheet, PDF (36/242 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Memory
Freescale Semiconductor, Inc.
2.3 Memory Map
The central processor unit (CPU) can address 8 kilobytes of memory
space as shown in Figure 2-1. The memory map includes:
• The erasable programmable read-only memory (EPROM) portion
of memory holds the program instructions, fixed data,
user-defined vectors, and interrupt service routines.
• The random-access memory (RAM) portion of memory holds
variable data.
• Input/output (I/O) registers are memory mapped so that the CPU
can access their locations in the same way that it accesses all
other memory locations.
$1EFF
Figure 2-1. Memory Map
2.4 Input/Output Registers
Figure 2-2 and Figure 2-3 summarize:
• The first 32 addresses of the memory space, $0000–$001F,
containing the I/O registers section
• One I/O register located outside the 32-byte I/O section, which is
the computer operating properly register (COPR) mapped at
$1FF0
Advance Information
36
MC68HC705JJ7 • MC68HC705JP7 — REV 4
Memory
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA