M38062M3-156FP MITSUBISHI [Mitsubishi Electric Semiconductor], M38062M3-156FP Datasheet - Page 10

• Manufacturer Part Number: M38062M3-156FP
• Description: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Memory
Special function register (SFR) area
The Special Function Register area in the zero page contains con-
trol registers such as I/O ports and timers.
RAM
RAM is used for data storage and for stack area of subroutine
calls and interrupts.
ROM
The first 128 bytes and the last 2 bytes of ROM are reserved for
device testing and the rest is user area for storing programs.
Interrupt vector area
The interrupt vector area contains reset and interrupt vectors.
Fig. 2 Memory map diagram
10
RAM area
ROM area
RAM capacity
ROM capacity
(bytes)
(bytes)
12288
16384
20480
24576
28672
32768
36864
40960
45056
49152
53248
57344
61440
1024
4096
8192
192
256
384
512
640
768
896
00FF
013F
01BF
023F
02BF
033F
03BF
043F
Address
F000
E000
D000
C000
B000
A000
9000
8000
7000
6000
5000
4000
3000
2000
1000
YYYY
Address
XXXX
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
F080
E080
D080
C080
B080
A080
9080
8080
7080
6080
5080
4080
3080
2080
1080
Address
ZZZZ
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
RAM
ROM
Zero page
The 256 bytes from addresses 0000
zero page area. The internal RAM and the special function regis-
ters (SFR) are allocated to this area.
The zero page addressing mode can be used to specify memory
and register addresses in the zero page area. Access to this area
with only 2 bytes is possible in the zero page addressing mode.
Special page
The 256 bytes from addresses FF00
special page area. The special page addressing mode can be
used to specify memory addresses in the special page area. Ac-
cess to this area with only 2 bytes is possible in the special page
addressing mode.
XXXX
YYYY
FFDC
0100
ZZZZ
FFFE
FFFF
0440
FF00
0000
0040
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
16
16
16
16
16
16
16
16
16
16
16
Reserved ROM area
Reserved ROM area
Interrupt vector area
Reserved area
SFR area
(128 bytes)
Not used
MITSUBISHI MICROCOMPUTERS
16
16
3806 Group
Zero page
to 00FF
to FFFF
Special page
16
16
are called the
are called the