參數(shù)資料
型號: M38001S8-XXXFS
廠商: Mitsubishi Electric Corporation
英文描述: Excalibur JFET-Input High-Output-Drive uPower Operational Amplifier 8-SOIC 0 to 70
中文描述: 8位單片機(jī)
文件頁數(shù): 63/173頁
文件大?。?/td> 4203K
代理商: M38001S8-XXXFS
APPLICATION
2.2 Timer
2-15
3800 GROUP USER’S MANUAL
(3) Timer application example 2 : Piezoelectric buzzer output
Outline :
The rectangular waveform output function of a timer is applied for a piezoelectric buzzer
output.
Specifications :
The rectangular waveform resulting from dividing clock f(X
IN
) = 4.19 MHz into about
2 kHz (2048 Hz) is output from the P5
4
/CNTR
0
pin.
The level of the P5
4
/CNTR
0
pin fixes to “H” while a piezoelectric buzzer output is
stopped.
Figure 2.2.13 shows an example of a peripheral circuit, and Figure 2.2.14 shows a connection of the
timer and setting of the division ratio.
Fig. 2.2.13 Example of a peripheral circuit
Fig. 2.2.14 Connection of the timer and setting of the division ratio [Piezoelectric buzzer output]
244
μ
s
244
μ
s
3800 group
PiPiPi....
P5
4
/CNTR
0
Set a division ratio so that the underflow output cycle of the Timer X becomes this value.
The “H” level is output while a piezoelectric buzzer output is stopped.
CNTR
0
output
1/16
1/2
f(X
IN
) = 4.19 MHz
Fixed
Timer X
Fixed
1/64
CNTR
0
1
Prescaler X
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