參數(shù)資料
型號(hào)： M38503M4H
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)： 29/86頁(yè)
文件大?。?/td> 1193K
代理商： M38503M4H
29
3850 Group (Spec. H)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PULSE WIDTH MODULATION (PWM)
The 3850 group (spec. H) has a PWM function with an 8-bit
resolution, based on a signal that is the clock input X
IN
or that
clock input divided by 2.
Data Setting
The PWM output pin also functions as port P4
4
. Set the PWM
period by the PWM prescaler, and set the
“
H
”
term of output pulse
by the PWM register.
If the value in the PWM prescaler is n and the value in the PWM
register is m (where n = 0 to 255 and m = 0 to 255) :
PWM period = 255
(n+1) / f(X
IN
)
= 31.875
(n+1)
μ
s
(when f(X
IN
) = 8 MHz,count source selection bit =
“
0
”
)
Output pulse
“
H
”
term = PWM period
m / 255
= 0.125
(n+1)
m
μ
s
(when f(X
IN
) = 8 MHz,count source selection bit =
“
0
”
)
Fig. 27 Timing of PWM period
Fig. 28 Block diagram of PWM function
PWM Operation
When bit 0 (PWM enable bit) of the PWM control register is set to
“
1
”
, operation starts by initializing the PWM output circuit, and
pulses are output starting at an
“
H
”
.
If the PWM register or PWM prescaler is updated during PWM
output, the pulses will change in the cycle after the one in which
the change was made.
3
1
.
8
7
5
2
m
5
(
n
+
1
)
5
μ
s
T
=
[
3
1
.
8
7
5
(
n
+
1
)
]
μ
s
P
W
M
o
u
t
p
u
t
m
n
T
:
:
:
C
C
P
s
o
o
W
e
l
n
n
t
t
M
e
c
e
e
n
n
p
t
i
t
t
s
s
e
n
r
o
o
i
b
f
f
d
i
t
P
P
=
W
W
(
w
M
M
h
0
r
p
n
e
r
g
e
f
(
i
s
X
I
s
t
e
a
N
)
r
l
c
e
r
o
e
”
)
=
8
M
H
z
,
c
o
u
n
t
s
o
u
r
c
e
o
“
Data bus
Count source
selection bit
“
0
”
“
1
”
PWM
prescaler pre-latch
P
t
e
W
r
M
p
r
r
e
g
i
s
e
-
l
a
t
c
h
PWM
prescaler latch
PWM
register latch
Transfer control circuit
PWM register
1/2
X
I
N
Port P4
4
latch
P
W
M
e
n
a
b
l
e
b
i
t
Port P4
4
P
W
M
p
r
e
s
c
a
l
e
r
(X
CIN
at low-speed mode)
相關(guān)PDF資料
PDF描述
M38513M4 Hook-Up Wire; Conductor Size AWG:26; No. Strands x Strand Size:7 x 34; Jacket Color:Dark Blue; Approval Bodies:UL, CSA; Approval Categories:UL AWM Style 1061; CSA AWM; Conductor Material:Copper RoHS Compliant: Yes
M38513M4-C56FP Hook-Up Wire; Conductor Size AWG:28; No. Strands x Strand Size:7 x 36; Jacket Color:Red; Approval Bodies:UL, CSA; Approval Categories:UL AWM Style 1061; CSA AWM; Conductor Material:Copper; Jacket Material:Polyvinylchloride (PVC) RoHS Compliant: Yes
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參數(shù)描述
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