參數(shù)資料
型號: M38001E7-XXXSP
廠商: Mitsubishi Electric Corporation
元件分類: DC/DC變換器
英文描述: 1 watt dc-dc converters
中文描述: 1瓦的DC - DC轉(zhuǎn)換器
文件頁數(shù): 59/173頁
文件大小: 4203K
代理商: M38001E7-XXXSP
2-11
3800 GROUP USER’S MANUAL
APPLICATION
2.2 Timer
2.2.3 Timer application examples
(1) Basic functions and uses
[Function 1]
Control of Event interval (Timer X, Timer Y, Timer 1, Timer 2)
The Timer count stop bit is set to “0” after setting a count value to a timer. Then a timer interrupt
request occurs after a certain period.
[Use]
Generation of an output signal timing
Generation of a waiting time
[Function 2]
Control of Cyclic operation (Timer X, Timer Y, Timer 1, Timer 2)
The value of a timer latch is automatically written to a corresponding timer every time a timer
underflows, and each cyclic timer interrupt request occurs.
[Use]
Generation of cyclic interrupts
Clock function (measurement of 250m second)
Control of a main routine cycle
Application example 1
[Function 3]
Output of Rectangular waveform (Timer X, Timer Y)
The output level of the CNTR pin is inverted every time a timer underflows (Pulse output mode).
[Use]
A piezoelectric buzzer output
Generation of the remote-control carrier waveforms
Application example 2
[Function 4]
Count of External pulse (Timer X, Timer Y)
External pulses input to the CNTR pin are selected as a timer count source (Event counter
mode).
[Use]
Measurement of frequency
Division of external pulses.
Generation of interrupts in a cycle based on an external pulse.
(count of a reel pulse)
Application example 3
[Function 5]
Measurement of External pulse width (Timer X, Timer Y)
The “H” or “L” level width of external pulses input to CNTR pin is measured (Pulse width
measurement mode).
[Use]
Measurement of external pulse frequency (Measurement of pulse width of FG pulse
8
gener-
ated by motor)
Application example 4
Measurement of external pulse duty (when the frequency is fixed)
8
FG
pulse : Pulse used for detecting the motor speed to control the motor speed.
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