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M38512M4 Datasheet(PDF) 6 Page - Mitsubishi Electric Semiconductor

Part No. M38512M4
Description  SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER 
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Maker  MITSUBISHI [Mitsubishi Electric Semiconductor]
Homepage  http://www.mitsubishichips.com
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M38512M4 Datasheet(HTML) 6 Page - Mitsubishi Electric Semiconductor

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6
3851 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
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.
Zero Page
Access to this area with only 2 bytes is possible in the zero page
addressing mode.
Special Page
Access to this area with only 2 bytes is possible in the special
page addressing mode.
Fig. 5 Memory map diagram
010016
000016
004016
FF0016
FFDC16
FFFE16
FFFF16
192
256
384
512
640
768
896
1024
1536
2048
3072
4032
XXXX16
00FF16
013F16
01BF16
023F16
02BF16
033F16
03BF16
043F16
063F16
083F16
0C3F16
0FFF16
4096
8192
12288
16384
20480
24576
28672
32768
36864
40960
45056
49152
53248
57344
61440
F00016
E00016
D00016
C00016
B00016
A00016
900016
800016
700016
600016
500016
400016
300016
200016
100016
F08016
E08016
D08016
C08016
B08016
A08016
908016
808016
708016
608016
508016
408016
308016
208016
108016
YYYY16
ZZZZ16
RAM
ROM
044016
SFR area
Not used
Interrupt vector area
ROM area
Reserved ROM area
(128 bytes)
Zero page
Special page
RAM area
RAM size
(bytes)
Address
XXXX16
ROM size
(bytes)
Address
YYYY16
Reserved ROM area
Address
ZZZZ16
Reserved area


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