參數(shù)資料
型號(hào): M34501E4FP
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
中文描述: 單芯片4位微機(jī)的CMOS
文件頁(yè)數(shù): 15/113頁(yè)
文件大小: 1252K
代理商: M34501E4FP
15
4501 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PROGRAM MEMOY (ROM)
The program memory is a mask ROM. 1 word of ROM is composed
of 10 bits. ROM is separated every 128 words by the unit of page
(addresses 0 to 127). Table 1 shows the ROM size and pages. Fig-
ure 10 shows the ROM map of M34501M4.
Table 1 ROM size and pages
Product
M34501M2
M34501M4
M34501E4
ROM (PROM) size
(
10 bits)
2048 words
4096 words
4096 words
Pages
16 (0 to 15)
32 (0 to 31)
32 (0 to 31)
A part of page 1 (addresses 0080
16
to 00FF
16
) is reserved for in-
terrupt addresses (Figure 11). When an interrupt occurs, the
address (interrupt address) corresponding to each interrupt is set
in the program counter, and the instruction at the interrupt address
is executed. When using an interrupt service routine, write the in-
struction generating the branch to that routine at an interrupt
address.
Page 2 (addresses 0100
16
to 017F
16
) is the special page for sub-
routine calls. Subroutines written in this page can be called from
any page with the 1-word instruction (BM). Subroutines extending
from page 2 to another page can also be called with the BM in-
struction when it starts on page 2.
ROM pattern (bits 7 to 0) of all addresses can be used as data ar-
eas with the TABP p instruction.
Fig. 10 ROM map of M34501M4/M34501E4
Fig. 11 Page 1 (addresses 0080
16
to 00FF
16
) structure
0
8
7
6
5
4
3
2
1
0
0
1
0
0
F
1
0
0
7
F
1
0
1
6
8
0
1
F
1
0
1
6
0
0
1
7
F
1
8
0
1
6
6
S
u
b
r
o
u
t
i
n
e
s
p
e
c
i
a
l
p
a
g
e
6
6
6
0
P
a
a
a
g
e
1
P
g
e
2
P
a
g
e
0
P
g
e
3
P
a
g
e
3
1
0
F
F
F
1
6
Interrupt address page
9
9
0
8
7
6
5
4
3
2
1
External 0 interrupt address
0080
16
0082
16
Timer 1 interrupt address
0084
16
Timer 2 interrupt address
0
8
6
1
6
0088
16
0
8
A
1
6
00FF
16
A-D interrupt address
008C
16
008E
16
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