Renesas PROM Programming Adapter PCA7447FP Información técnica Pagina 14

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11
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
38C8 Group
MEMORY
Special Function Register (SFR) Area
The Special Function Register area in the zero page contains control
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. 8 Memory map diagram
192
256
384
512
640
768
896
1024
1536
2048
0
0
F
F
1
6
0
1
3
F
1
6
0
1
B
F
1
6
0
2
3
F
1
6
0
2
B
F
1
6
0
3
3
F
1
6
0
3
B
F
1
6
0
4
3
F
1
6
0
6
3
F
1
6
0
8
3
F
1
6
R
A
M
a
r
e
a
R
A
M
s
i
z
e
(
b
y
t
e
s
)
A
d
d
r
e
s
s
X
X
X
X
1
6
4096
8192
12288
16384
20480
24576
28672
32768
36864
40960
45056
49152
53248
57344
61440
F
000
16
E000
16
D000
16
C000
16
B000
16
A000
16
9000
16
8000
16
7000
16
6000
16
5000
16
4000
16
3000
16
2000
16
1000
16
F
080
16
E080
16
D080
16
C080
16
B080
16
A080
16
9080
16
8080
16
7080
16
6080
16
5080
16
4080
16
3080
16
2080
16
1080
16
R
O
M
a
r
e
a
R
O
M
s
i
z
e
(
b
y
t
e
s
)
A
d
d
r
e
s
s
Y
Y
Y
Y
1
6
A
d
d
r
e
s
s
Z
Z
Z
Z
1
6
0000
16
0040
16
0430
16
F
F
0
0
1
6
FFDC
16
FFFE
16
F
F
F
F
1
6
X
X
X
X
1
6
Y
Y
Y
Y
1
6
Z
Z
Z
Z
1
6
RAM
ROM
SFR
area
N
ot use
d
I
nterrupt vector are
a
R
eserve
d
ROM
area
(128 bytes)
Z
ero page
S
pec
i
a
l
page
LCD display RAM area
R
e
s
e
r
v
e
d
R
O
M
a
r
e
a
0130
16
0
8
4
0
1
6
The start address of the LCD display area can be switched either zero page (addresses 0040
16
012F
16
) or 3 page (addresses
0340
16
042F
16
) by software. Immediately after reset released, 3 page is selected.
0340
16
LCD display RAM area
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