V58020 chip equivalent, 4 i/o single-channel voice chip.
PWM PWM / DAC Tigger1 / LED PWM3 / SPI DI Tigger2 / Pause & Resume / LED PWM2 / Reset(Low active) / SPI CLOCK Tigger3 / Volume Control / LED PWM1 / SPI DO Tigger4 / Volume Control / LED PWM3 / SPI CS (Optional)
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