參數(shù)資料
型號： M38037M6-122FP
廠商： Mitsubishi Electric Corporation
英文描述： TACHOMETER ONE CHANNEL
中文描述： 單芯片8位CMOS微機(jī)
文件頁數(shù)： 58/135頁
文件大?。?/td> 2055K
代理商： M38037M6-122FP
58
3803/3804 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
Serial I/O3
Serial I/O3 can be used as either clock synchronous or asynchro-
nous (UART) serial I/O. A dedicated timer is also provided for
baud rate generation.
(1) Clock Synchronous Serial I/O Mode
Clock synchronous serial I/O3 mode can be selected by setting
the serial I/O3 mode selection bit of the serial I/O3 control register
(bit 6 of address 0032
16
) to “1”.
For clock synchronous serial I/O, the transmitter and the receiver
must use the same clock. If an internal clock is used, transfer is
started by a write signal to the transmit/receive buffer register.
Fig. 48 Block diagram of clock synchronous serial I/O3
Fig. 49 Operation of clock synchronous serial I/O3
1/4
1
/
4
F/F
P
3
6
/
S
C
L
K
3
Serial I/O3 status register
Serial I/O3 control register
P3
7
/S
RDY3
P3
4
/R
X
D
3
P3
5
/T
X
D
3
Receive buffer register 3
Address 0030
16
R
e
c
e
i
v
e
s
h
i
f
t
r
e
g
i
s
t
e
r
3
Receive buffer full flag (RBF)
Receive interrupt request (RI)
C
l
o
c
k
c
o
n
t
r
o
l
c
i
r
c
u
i
t
Shift clock
Serial I/O3 synchronous
clock selection bit
Frequency division ratio 1/(n+1)
Baud rate generator 3
Address 002F
16
B
R
G
c
o
u
n
t
s
o
u
r
c
e
s
e
l
e
c
t
i
o
n
b
i
t
Clock control circuit
F
a
l
l
i
n
g
-
e
d
g
e
d
e
t
e
c
t
o
r
Transmit buffer register 3
Data bus
Address 0030
16
Shift clock
Transmit shift completion flag (TSC)
Transmit buffer empty flag (TBE)
Address 0031
16
Transmit interrupt request (TI)
Transmit interrupt source selection bit
D
a
t
a
b
u
s
A
d
d
r
e
s
s
0
0
3
2
1
6
T
r
a
n
s
m
i
t
s
h
i
f
t
r
e
g
i
s
t
e
r
3
f(X
IN
)
(f(X
CIN
) in low-speed mode)
D
7
D
7
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
0
D
1
D
2
D
3
D
4
D
5
D
6
R
T
e
t
e
B
S
r
r
c
F
C
n
i
o
n
=
=
e
r
1
1
r
T
B
E
=
0
TBE = 1
TSC = 0
T
2
r
r
a
4
n
n
8
s
e
f
e
f
t
r
t
e
h
r
s
h
e
n
i
i
f
n
l
t
t
c
c
e
l
l
o
r
n
o
c
c
a
k
k
(
1
/
2
l
o
t
c
o
k
,
1
/
0
a
o
x
a
l
c
o
)
S
e
r
i
a
l
o
u
t
p
u
t
T
x
D
3
S
e
r
i
a
l
i
n
p
u
t
R
x
D
3
W
u
r
f
i
t
e
r
r
p
e
u
g
l
i
s
s
e
t
t
r
o
r
a
e
d
c
d
e
r
i
e
v
e
s
/
t
r
0
a
0
n
3
s
0
1
m
i
t
b
f
e
e
(
s
6
)
O
d
v
e
u
t
o
r
(
O
E
)
Notes 1
:
A
t
r
c
I
f
i
s
T
s
a
o
h
n
n
d
o
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t
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p
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t
h
(
a
T
s
I
)
,
n
w
d
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i
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d
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c
a
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n
C
b
=
e
1
)
s
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b
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m
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p
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(
(
T
T
I
B
C
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)
=
o
1
f
)
t
o
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/
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O
3
o
r
e
(
i
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r
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l
2
:
t
o
r
r
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u
u
t
s
p
h
l
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e
y
(
f
R
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r
r
o
I
a
n
m
)
s
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w
u
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D
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.
g
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w
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C
=
0
,
t
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a
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3
:
i
e
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c
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b
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f
u
l
l
f
l
a
g
(
R
B
F
)
b
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c
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m
e
s
“
1
”
.
R
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c
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n
a
b
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s
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a
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S
R
D
Y
3
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