The NVD series voice chip supports a set of PWM output ports, which can directly push the 0.5W speaker, built-in LVR reset, internal resistance frequency vibrator (maximum+-1%error). The connection of multiple keys to triggers, as well as the main control MCU first -line serial control method and support the 8 -pin voice chip with 223 sounds and 44100 sampling rate.

★ OTP storage format, fast production cycle, only one day as soon as possible, there is no minimum limit on the order;

★ Flexible multi -key operation mode and level output method for selection (edge button trigger, level trigger, random keys play, sequential button playback);

★ Simple and convenient first -line MCU serial port and control method, the user controls MCU to control the trigger playback and stop of any paragraph;

★ The voice time is 40 seconds, 80 seconds, 170 seconds, 340 seconds;

★ Built -in a set of PWM outputs can directly push the 0.5W speaker;

★ Support 16 -level sound adjustment, support cycle playback and other functions;

★ Flexible sounding operation can save voice space by combining, and can play up to 220 voice combinations;

★ The sound quality is beautiful, the performance is stable, the quality is cheap, and the static current is less than 2UA;

★ Built -in LVR self -reset circuit to ensure the normal work of the chip;

★ SOP8 and COB encapsulation are available, easy to use, flexible application; flexible application;

★ Support 4 chord MIDI playback, the sound quality is very beautiful;

★ The peripheral circuit is simple, only one coupling capacitance is required;

★ Work voltage range: 2V ~ 5V.

★ IO mouth is rich, built -in MCU, you can customize various special functions;

① MCU front -line serial control (with continuous code function)

The MCU first -line serial control refers to the main control of the MCU through the data data cable to control the trigger playing and stopping of any of the voice. The timing uses the following sequence.

The correspondence between data and voice

It can support the sending of 223 sounds and commands. The format of voice address sending and command sending is the same, and each other is independent of each other.

② MCU second -line serial control (with code)

Key control mode: The defined pipe foot can directly touch the chip sound, that is, each pin can control a paragraph. The trigger method of each switch can be set separately, and the anti -shake time of the keys control mode is 17ms.

NVD series voice chips are suitable for occasions where various voice prompts, such as: blood pressure meter, attendance machine, blood glucose meter, medical device, massage device, footbath, doorbell bottom , Reading Buddhist machines, gaming machines, craft gifts, smart locks (fingerprint locks, password locks, swiping card locks), codes scanning machines, and so on.