Application of intelligent voice prompt chip in handheld vacuum cleaner

The working principle of a handheld vacuum cleaner is to use an electric motor to drive the blades to rotate at high speed, generate negative air pressure in a sealed shell, and absorb dust. Because of its small size and strong convenience, many consumers will equip their families with a small vacuum cleaner to remove small debris such as sofas, car seats, and office desks.

There are many types of vacuum cleaners on the market, and their functions are similar. However, if something goes wrong, it is difficult to know the cause immediately, such as insufficient battery power, clogged filter element, etc. If a voice prompt function is added, users can immediately know the current abnormal status;

Shenzhen Weitronics has developed an intelligent voice prompt chip: WT588F02B-8S. A single chip has 220KB of Flash and supports 6K~32Khz WAV files. At a higher sound quality, it can store up to 170 seconds of voice content. If there is no requirement for sound quality, it can store 320 seconds of voice. WT588F02B-8S-8S is different from traditional OTP chips. Customers can use the matching downloader to replace the internal voice content of the chip online. The chip has built-in hardware SPI, UART, IIC, comparator and other resources, which can customize various personalized functional products for customers.

WT588F02B-8S, the chip has a built-in 8Ω.0.5W power amplifier circuit with PWM output, and can also be connected to an external DAC amplifier. The operating temperature can be maintained at: -20℃ ~ +85℃;

WT588F02B-8S Features

1. 16-bit DSP voice chip, 32Mhz internal oscillation;

2. Working voltage 2.0~5.5V (reset voltage is 2.2V before V1.35 and 2.0V after V1.35);

3. 16-bit PWM/DAC output, can directly drive 8R 0.5W speakers;

4. Support 6K~32Khz WAV files;

5. Customers can replace the internal voice content of the chip through MCU or the supporting downloader;

6. Support one-line serial port and two-line serial port (UART and IIC communication will be released soon);

7. Support up to 6-channel midi playback;

8. Support more than 1000 segments of addresses;

9. It has hardware SPI interface, UART interface, IIC, built-in comparator and other interfaces. Various functions can be customized for customers.

10. The chip has built-in 220KB Flash.

11. Both the chip master program and Flash data can be erased and re-written.

12. The chip power-on initialization time is about 200ms

13. After the chip finishes playing and the IO port (DATA and CLK) maintains a stable level (either high or low level) for 1S, the chip enters sleep mode.

Pin Definition

Functions after adding WT588F02B-8S voice chip

1. Voice prompts for changing modes make it easier for users to know the current working mode, and also for people with poor eyesight;

2. Start-up slogans to promote the brand;

3. Fault prompt: filter element is blocked, battery power is low,