參數(shù)資料
型號(hào): M37471E8SS
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述: 單芯片8位CMOS微機(jī)
文件頁(yè)數(shù): 35/46頁(yè)
文件大?。?/td> 646K
代理商: M37471E8SS
35
7470/7471 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
EPROM MODE
The M37470E4/E8, M37471E4/E8 feature an EPROM mode in ad-
dition to its normal modes. When the RESET signal level is low
(“L”), the chip automatically enters the EPROM mode. Table 2 lists
the correspondence between pins and Figure 30 to 32 give the pin
connection in the EPROM mode. When in the EPROM mode,
ports P0, P1
1
–P1
7
, P2
0
–P2
3
, P3, P4
0
, P4
1
, V
REF
are used for the
PROM (equivalent to the M5L27256). When in this mode, the built-
in PROM can be written to or read from using these pins in the
same way as with the M5L27256. The oscillator should be con-
nected to the X
IN
and X
OUT
pins, or external clock should be
connected to the X
IN
pin.
Table 2. Pin function in EPROM mode
M37470E4/E8, M37471E4/E8
V
CC
P3
3
V
SS
Ports
P1
1
–P1
7
, P2
0
–P2
3
,
P3
0
, P3
1
, P4
0
, P4
1
Port P0
V
REF
P3
2
V
CC
V
PP
V
SS
Address input
M5L27256
V
CC
V
PP
V
SS
Fig. 28 Pin connection in EPROM mode
Data I/O
CE
OE
A
0
–A
14
D
0
–D
7
CE
OE
A
10
A
9
A
8
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
V
SS
CE
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
A
14
A
13
V
PP
A
12
A
11
V
CC
OE
V
SS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
28
29
30
31
32
M
M
M
P1
7
/S
RDY
P1
6
/CLK
P1
5
/S
OUT
P1
4
/S
IN
P1
3
/
P1
2
/T
0
P1
1
P1
0
P2
3
/IN
3
P2
2
/IN
2
P2
1
/IN
1
P2
0
/IN
0
V
REF
X
IN
X
OUT
V
SS
P0
7
P0
6
P0
5
P0
4
P0
3
P0
2
P0
1
P0
0
P4
3
P4
2
P4
1
P4
0
P3
3
/CNTR
1
P3
2
/CNTR
0
P3
1
/INT
1
P3
0
/INT
0
RESET
P5
1
/X
COUT
P5
0
/X
CIN
V
CC
17
26
25
24
23
22
18
19
20
21
27
33
35
36
37
38
39
40
41
42
34
P5
3
P2
7
/IN
7
P2
6
/IN
6
P2
5
/IN
5
P2
4
/IN
4
P5
2
: Same functions as M5L27256
T
1
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