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MSA180

¡ Semiconductor

Application Example for Circuits Containing MSM6375/MSM6650 Family Speech Synthesizers

The example below shows how to connect the MSA180 with the MSM6375 or MSM6650 family

speech synthesizers using the synthesizer's BUSY output to control operation and standby mode of

the MSA180. As voice output stops, BUSY rises to the "H" level. For this reason, MODE2 is used to

control operation and standby modes of the MSA180.

2. This circuit makes use of the BUSY output of the speech synthesizer.

3. As the voice reproduction stops, BUSY outputs a "H" level to MODE2, setting the stand-

by function.

4. If MODE2 is used, MODE1 must be connected to GND.

5. Leave the BASE pin open if it is not used.

MSM6650

or MSM6375

AOUT

GND

SP

C1

MSA180

BASE

SP

GND

MODE1

PIEZO SPEAKER

R1

MODE2

BUSY