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M38B71M1 Datasheet(PDF) 13 Page - Renesas Technology Corp

Part No. M38B71M1
Description  SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
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Maker  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
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M38B71M1 Datasheet(HTML) 13 Page - Renesas Technology Corp

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38B7 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
12
MEMORY
Special Function Register (SFR) Area
The special function register (SFR) area contains control registers
for I/O ports, timers and other functions.
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 other areas are user areas for storing pro-
grams.
Interrupt Vector Area
The interrupt vector area contains reset and interrupt vectors.
Zero Page
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 special page addressing mode can be used to specify memory
addresses in the special page area. Access to this area with only 2
bytes is possible in the special page addressing mode.
Fig. 8 Memory map diagram
010016
000016
004016
044016
FF0016
FFDC16
FFFE16
FFFF16
192
256
384
512
640
768
896
1024
1536
2048
XXXX16
00FF16
013F16
01BF16
023F16
02BF16
033F16
03BF16
043F16
063F16
083F16
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
0EE016
0F0016
0EFF16
0FFF16
0EDF16
0E0016
Reserved area
SFR area 1
Not used (Note)
Interrupt vector area
ROM area
Reserved ROM area
(common ROM area,128 bytes)
Zero page
Special page
RAM area
RAM size
(byte)
Address
XXXX16
ROM size
(byte)
Address
YYYY16
Reserved ROM area
Address
ZZZZ16
SFR area 2
RAM area for Serial I/O
automatic transfer
Note: When 1024 bytes or more are used as RAM area, this area can be used.
RAM area for FLD automatic display


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