參數(shù)資料
型號: M30201M2
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
中文描述: 單片16位CMOS微機
文件頁數(shù): 58/159頁
文件大小: 2319K
代理商: M30201M2
Unde
Timer A
deeopmen
Mitsubishi microcomputers
M30201 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
58
Figure 1.46. Example of how a 16-bit pulse width modulator operates
Figure 1.47. Example of how an 8-bit pulse width modulator operates
1 / f
i
X
(2 – 1)
Count source
TA0
IN
pin
input signal
PWM pulse output
from TA0
OUT
pin
Condition : Reload register = 0003
16
, when external trigger
(rising edge of TA0
IN
pin input signal) is selected
Trigger is not generated by this signal
“H”
“H”
“L”
“L”
Timer A0 interrupt
request bit
“1”
“0”
Cleared to “0” when interrupt request is accepted, or cleared by software
f
i
: Frequency of count source
(f
1
, f
8
, f
32
, f
C32
)
Note: n = 0000
16
to FFFF
16
.
1 / f
i
X
n
Count source (Note1)
TA0
IN
pin input signal
Underflow signal of
8-bit prescaler (Note2)
PWM pulse output
from TA0
OUT
pin
“H”
“H”
“H”
“L”
“L”
1 / f
i
X (m + 1) X n
“L”
“1”
“0”
Timer A0 interrupt
request bit
Cleared to “0” when interrupt request is accepted, or cleaerd by software
f
i
: Frequency of count source
(f
1
, f
8
, f
32
, f
C32
)
Note 1: The 8-bit prescaler counts the count source.
Note 2: The 8-bit pulse width modulator counts the 8-bit prescaler's underflow signal.
Note 3: m = 00
16
to FF
16
; n = 00
16
to FF
16
.
Condition :
Reload register high-order 8 bits = 02
16
Reload register low-order 8 bits = 02
16
External trigger (falling edge of TA0
IN
pin input signal) is selected
1 / f
i
X (m
+ 1) X (2 – 1)
1 / f
i
X (m + 1)
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