W528S03 Datasheet, PDF (16/17 Pages) Winbond – ADPCM VOICE SYNTHESIZER

W528SXX
B. Ttigger Pin Coupling Effect
The trigger pins (TG1−TG4) are built-in 500KΩ pull high resistor.
If the wire of the input trigger is very close to the speaker wire in the application environment, the
coupling effect will occur. The input voltage of the trigger pin will be unstable, causing the trigger
operation to become abnormal.
An external pull high resistor (Ri) connecting the trigger pin and VDD can resolve this problem. The
value of the Ri depends on your application environment.
V_DD
Ri
TGn
SPK
VDD
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