TB6548F/FG

2006-03-02

8

8.

Start/Stop Control

Start/Stop is controlled using the PWM signal input pin.

A stop is acknowledged when the PWM signal duty is 0, and a start is acknowledged when the ON-signal

of a frequency four times higher than the resonator frequency or greater is input continuously.

Timing chart

Note: Take sufficient care regarding noise on the PWM signal input pin.

PWM signal

Detection

timing

Start

512 periods at the resonator frequency

First detection

Second detection

Start

PWM signal

Detection

timing

Stop

512 periods at the resonator frequency

First detection

Second detection

and stop