1, the voice chip refers to the IC that can store and control the playback of speech,Also known as sound chip, audio ic. According to the output mode of the voice chip can be divided into two categories, one is PWM output mode, the other is DAC output mode.
2, IC is a chip, that is, we often say integrated circuit. IC recording is to use an integrated memory chip to collect and record the sound. Completely free from the bondage of the previous tape, the disc.
3, voice IC and voice chip is the same meaning, but the name is different. OTP is a kind of voice chip. OTP's voice chip uses one-time programmable (OTP) memory>
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1, WTV series voice chip is produced by Waytronic company, with different models and functions, these chips can be controlled by key or serial port control, support recording and playback of multiple voice, with different storage capacity and playback time.
2, Scheme 1: MCU 74HC573 latch chip clock chip voice broadcast chip; Scheme 2: MCU 74HC573 latch chip crystal oscillator voice broadcast chip; The scheme we will introduce below only needs MCU WT588F02KD-24SS chip second hop chip to achieve the functional requirements required by the above scheme design.
3, use WT588D voice chip. WT588D is a commonly used voice chip, which can be used with 51 single chip microcomputer to realize voice broadcasting function. Design of bus announcement systemWT588D can be used as a recording module, which is controlled by 51 MCU to play different voice files.
According to the output mode of the voice chip can be divided into two categories, one is PWM output mode, one is DAC output mode. PWM output volume is not continuous adjustable, can not be connected to ordinary power amplifier, most of the voice chips on the market are PWM output mode. Generally used in smart home and security fields such as smart doorbell, alarmWait on the product.
The audio signal is directly output from the PWM pin of the chip without the power amplifier, and the audio signal without the power amplifier can not be played directly by the speaker, so the chip with the DAC output mode can only be played by the external power amplifier, and cannot be directly pushed by the speaker.
According to the output mode of the voice chip is divided into two categories, one is PWM output mode, the other is DAC output mode, PWM output volume is not continuous adjustable, can not be connected to the ordinary power amplifier, most of the voice chip on the market is PWM output mode.