NVB series voice chip is a newly launched industrial -grade OTP voice chip suitable for factories and stable industrial -grade OTP voice chips. It has many significant advantages such as low cost, stable performance, high sound quality, convenient control, and simple circuits. There is a set of PWM output ports that can be pushed directly with a 0.5W speaker, and the sound quality is clear. Built -in LVR reset, no need to add reset circuit. Built-in accurate internal resistance frequency vibrator (large+-1%error), no external connection resistance; multiple key trigger methods and DIP8/SOP8/COB packaging form, you can output multiple forms of level signals, settings can be set, you can set up According to the ups and downs of the voice. In addition, the NVB supports the main control MCU serial control, which can control the multi -speech trigger arbitrarily, and the peripheral circuit only requires a coupling capacitor.

★ 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 two -line MCU serial port control method, user control MCU can control the trigger playing and stopping of any paragraph voice;

★ Support 4 keys to trigger.

★ The voice duration is 20 seconds, 40 seconds, 65 seconds, 80 seconds, 115 seconds;

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

★ Flexible sound release operation can save voice space by combining, and a single data port can play up to 128 voice combinations;

★ Beautiful sound quality, stable performance, and cheap material;

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

★ DIP8, SOP8, and COB three packages are available, easy to use, flexible application;

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

★ Work voltage range: 1.6V ～ 4.5V (5V power supply needs to connect the diode 4148 to reduce voltage);

★ Static current: 2UA;

Remark:

1. The voice length is all calculated based on the 6K sampling rate. Generally, the sampling rate in the application is greater than 8K, so the voice length is only for reference.

2. All ICs of each second number support play chord;

① Control mode

The NVB series voice chips have a wealth of control. It is divided into key control modules and MCU first -line serial control mode. The key control module is divided into ON/OFF control, pulse can be repeated trigger, pulse non -repeated trigger, level maintenance trigger, level non -maintained trigger, DOWN's next song, random section trigger. When the O port is triggered by the MCU front line, it cannot be triggered as a button at the same time.

② Distribution of the port

Key control-low-level trigger

③Control description:

The level can be interrupted: Press the key to play the voice. When the voice is playing, the key will be restarted again when the key is pressed again.

The level cannot be interrupted: Press the button to play the voice. When the voice is playing, press the key again when the voice is played. The voice continues to play the previous paragraph until it is complete.

Keep the level circulation: The keys are pressed (the level has been triggered), and the voice will be kept in circulation.

The level is kept non -circulating: the keys are pressed (the level has been triggered), and the voice will be stopped after the voice playback.

Play once and play once: After power -on, the voice will be played once and then stops.

Playing cycle: After power -on, the voice will continue to be played.

Two -line serial port

Port distribution

Data and voice correspondence

DATA1 supports 128 -end sound

Data and voice correspondence

DATA2 supports 128 stages (shared with Data1, no need to limit the number of paragraphs alone)

Remark:

1. Data1 port supports 128 address playback, and the Data2 port also supports 128 address playback. If the response is fast, you need to use the expansion data port DATA2.

2.*It is recommended to use mute for a pulse, because when the single -chip microcomputer is powered on, the data port is unstable, which may lead to mistakes.

In addition, considering that the power -on voltage is unstable, if the single -chip microcomputer is controlled, the power is played, and the power is delayed by more than 5ms, and the address of the playback is sent. *Send it 2 times, and the interval is about 10ms. If you need to stop the voice that is being played, you can directly send a pulse, that is, the mute address.

NVB 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, voice alarm, car electronics, small appliances, small appliances , Reading Buddhist machines, gaming machines, craft gifts, smart locks (fingerprint locks, password locks, swiping card locks), coded scanning machine and so on.