3819 datasheet(95/218 Pages) RENESAS

Il numero della parte	3819

Spiegazioni elettronici	8-BIT SINGLE-CHIP MICROCOMPUTER

PDF	218 Pages

Scroll/Zoom	100%

Produttore elettronici	RENESAS [Renesas Technology Corp]

Homepage	http://www.renesas.com

Logo

95 / 218 page

2. APPLICATION

MITSUBISHI MICROCOMPUTER

3819 Group

2.2 Timer

3819 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, 2 kHz (2048 Hz) which is divided clock f(XIN) = 4.19 MHz is output

from the T3OUT pin.

• The level of the T3OUT pin fixes to “H” while a piezoelectric buzzer output is stopped.

Figure 2.2.15 shows an example of a peripheral circuit, and Figure 2.2.16 shows a connection of the timer and setting

of the division ratio.

Fig. 2.2.16 Connection of the timer and setting of the division ratio [Piezoelectric buzzer output]

Fig. 2.2.15 Example of a peripheral circuit

1/16

1/2

f(XIN) =

4.19 MHz

Fixed

Timer 3

Fixed

1/64

T3OUT

244

µs

244

µs

3819 group

PiPiPi....

T3OUT

Set a division ratio so that the underflow output cycle of the Timer 3 becomes this value.

The "H" level is output while a piezoelectric buzzer output is stopped.

3819 Scheda tecnica(PDF) 95 Page - Renesas Technology Corp