M38867E8AHP MITSUBISHI [Mitsubishi Electric Semiconductor], M38867E8AHP Datasheet - Page 10

• Manufacturer Part Number: M38867E8AHP
• 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. Pro-
gram/Erase of the reserved ROM area is possible in the EPROM
version and the flash memory version
Fig. 8 Memory map diagram
10
R A M a r e a
R O M a r e a
R A M s i z e
R O M s i z e
( b y t e s )
( b y t e s )
1 2 2 8 8
1 6 3 8 4
2 0 4 8 0
2 4 5 7 6
2 8 6 7 2
3 2 7 6 8
3 6 8 6 4
4 0 9 6 0
4 5 0 5 6
4 9 1 5 2
5 3 2 4 8
5 7 3 4 4
6 1 4 4 0
1 0 2 4
1 5 3 6
2 0 4 8
4 0 9 6
8 1 9 2
1 9 2
2 5 6
3 8 4
5 1 2
6 4 0
7 6 8
8 9 6
0 0 F F
0 1 3 F
0 1 B F
0 2 3 F
0 2 B F
0 3 3 F
0 3 B F
0 4 3 F
0 6 3 F
0 8 3 F
F 0 0 0
E 0 0 0
D 0 0 0
C 0 0 0
B 0 0 0
A 0 0 0
9 0 0 0
8 0 0 0
7 0 0 0
6 0 0 0
5 0 0 0
4 0 0 0
3 0 0 0
2 0 0 0
1 0 0 0
A d d r e s s
Y Y Y Y
A d d r e s s
X X X X
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
F 0 8 0
E 0 8 0
D 0 8 0
C 0 8 0
B 0 8 0
A 0 8 0
9 0 8 0
8 0 8 0
7 0 8 0
6 0 8 0
5 0 8 0
4 0 8 0
3 0 8 0
2 0 8 0
1 0 8 0
A d d r e s s
Z Z Z Z
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
N o t e s 1 :
R A M
R O M
2 : T h i s a r e a i s u sa b l e i n E P R O M v e r s i o n a n d f l a s h m e m o r y v e r s i o n .
T h i s a r e a i s S F R i n M 3 8 8 6 9 F F A .
T h i s a r e a i s R e s e r v e d i n M 3 8 8 6 9 M F A / M C A / M 8 A .
T h i s a r e a i s n o t u s e d i n M 3 8 8 6 7 M 8 A / E 8 A .
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.
X X X X
Y Y Y Y
F F D C
Z Z Z Z
F F F E
F F F F
0 F F E
0 F F F
F F 0 0
0 1 0 0
0 0 0 0
0 0 4 0
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
1 6
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
R e s e r v e d R O M a r e a
R e s e r v e d R O M a r e a
I n t e r r u p t v e c t o r a r e a
( N o t e 2 )
S F R a r e a
N o t u s e d
( N o t e 2 )
MITSUBISHI MICROCOMPUTERS
( 1 2 8 b y t e s )
S F R a r e a ( N o t e 1 )
3886 Group
Z e r o p a g e
S p e c i a l p a g e