The NRK11 voice recognition chip is a high-performance, low-cost offline voice recognition chip independently developed by Guangzhou Jiuxin Electronics. It has voice recognition and broadcast functions. It requires plug-in SPI-FLASH, storage entry or voice broadcast content. He has the advantages of high recognition rate, industrial -level performance, easy -to -use, and easy to update the entry. It is widely used in various fields such as smart homes, AI artificial intelligence, toys.

2. Product characteristics:

working voltage: 3.3V ~ 5.5V, generally 4.2V

dormant current: <7UA

Unbeatable to wait for the current: 25 ~ 50mA

Wake -up method: After dormancy, you can wake up from any GPIO, RTC, or WDT interruption to enter the standby state; in the standby state, enter the working state by waking words or entries.

fixed entry, non -specific person recognition

30 words (three words or more) can be recognized, and the total number of words is between 50 and 60 words.

Identification environment: quiet and no echo.

Identification effect: quiet and no echo environment, the recognition rate within 2 meters can reach 90%or more, and the distance can reach 5 meters.

Identification language: 32 types of languages, such as English, Chinese, Japanese, Cantonese, etc. (Do not recognize a variety of languages at the same time, that is, one module cannot recognize Chinese, English, Japanese).

PWM output can directly drive 8 Euros 0.5W speakers; DAC output, which can be connected to the power amplifier.

The content of the audio output needs to be placed in the plug -in spi_flash. Then, then

Low voltage reset: less than 1.6V chip for reset

3.3V, defaults to 3.3V.

working temperature: -10 & deg; c ~+70 & deg; C.

The chip program and entry storage method are OTP storage methods, & bull; disposable records, all of which are in the main control chip, which is convenient for samples and mass production. The voice of the broadcast is stored in the plug -in SPI Flash. Support 8M/16M/32Mbit SPI Flash.

built -in UART serial port, convenient for single -chip microcomputer control and communication.

built -in MIC 2 partial pressure amplifier circuit, as well as self -supported AGC gain control, and a rate noise circuit.

The form of packaging includes LQFP32, COB.

4. Function introduction

4.1, UART serial function introduction

NRK11 voice recognition chip built -in standard UART asynchronous serial interface, the communication data format is: starting bit: 2 digits; data bit: 2 digits; 00h ~ ffh; verification digit: 2 digits, the verification digit and the data bit are added For FFH. Use the computer serial port to determine the assistant, you need to set the parameters of the serial port correctly, and set the figure:

4.2. Play control introduction

Introduction to the entry: The entry refers to the entry of the standard version of the identification instructions we want to say & ldquo; Xiaoming & rdquo; as a wake -up word, we can identify other entries after waking up. For details, please refer to the table below:

        You can set the entry:

Wake up the answer instruction to answer the effect

Xiaoming, Xiaoming, I turned on the LED lamp that had been turned on and turned on the light.

Turn off the lights and turn off all LED lights

Bright brightening (the brightest) brightness from 10%-40%-100%

Darkness has been darkened (the darkest) brightness from 100%-40%-10%

The white light has been switched to the white light and white light LED bright (the previous state brightness)

Change orange light to switch to orange light orange light LED bright (previous state brightness)

Change neutral light to switch to neutral light white light orange light LED bright (previous state brightness)

Sleep mode has been switched to the color temperature of the previous state of the sleep mode, 10%bright, and all LED lights are turned off after 5 minutes of time

The maximum brightness has been the brightest brightness 100%

The minimum brightness is already the darker brightness 10%

Note: 1. This version can be directly connected to PA10 without serial version chip PA10, PA11 directly connects the lights; you can also use the serial version PA6, PA7 to directly output serial signal 2. Standard version entry for testing. If you want to modify the entry, please contact the business, please contact the business Personnel 3. UART port can be used with a single -chip microcomputer. 4. The delay time is 10 seconds after the wake -up. After receiving the instructions, re -count the time.

5. Application circuit diagram

6. Circuit diagram

(Principle diagram without serial version of the circuit)

(Principle diagram with serial port version of the circuit)

NRK11 series voice recognition chips are suitable for occasions where various voice prompts, such as: blood pressure meter, attendance machine, blood glucose meter, medical device, massage device, foot bath, doorbell tip Home appliances, Buddhist machines, gaming machines, craft gifts, smart locks (fingerprint locks, password locks, card locks), codes scanning machines, and so on.