Product Introduction
The WTK6900P chip is designed for local voice-triggered engines, featuring low cost, high reliability, and strong versatility. This solution supports offline recognition from up to 2 meters away, with the ability to handle approximately 15 command entries. The chip integrates a 32-bit CPU processor, a high-performance 0.5W Class D amplifier, and includes algorithms for voice recognition, audio decoding, echo cancellation, and howling suppression. It supports MP3, PCM, and ADPCM decoding, as well as digital volume control, SRC sampling rate conversion, and DRC dynamic range compression. It is an extremely simple yet high-performance voice recognition chip.
Chip characteristics
Basic Parameters
AI Algorithm
• Offline speech recognition using the latest neural network algorithms, featuring high accuracy and low error rates, reliable recognition up to 2 meters away.
• Voice noise reduction algorithm: Filters out steady-state noise and effectively suppresses dynamic noise, ensuring accurate recognition even in noisy environments.
Audio
• Single-channel 16-bit DAC, SNR ≥ 95dB
• Single-channel 16-bit ADC, SNR ≥ 90dB
• Supported sampling rates: 8kHz / 11.025kHz / 16kHz / 22.05kHz / 24kHz / 32kHz / 44.1kHz / 48kHz
• Analog MIC input, built-in MIC bias voltage output
Operating Conditions
• Operating Voltage: VCC: 2.4V to 5.0V
• Operating Temperature: -40°C to 85°C
Power Consumption
• Low power sleep mode: 5μA
• Active operation: 14mA
Storage
• Built-in 32KB high-speed SRAM
• 8KB dual-port instruction/data cache
• Integrated 4M-SPI NOR FLASH
• 512-bit eFuse unit
Peripheral Features
• Watchdog supports interrupt and reset, IO pins also support pin reset
• Two 16-bit timers with capture function
• Four standard PWM + one programmable PWM + one differential PWM
• Low voltage detection/reset module, power-on reset module
• One half-duplex UART
• External wake-up/interrupt on all GPIOs
Package
• ESOP8/SOP8
Application fields:
- Smart home appliances (lifestyle appliances, health appliances, kitchen appliances, etc.)
- Smart bathroom facilities, smart lighting, smart electromechanical systems, smart homes, and smart toys.
Encapsulation pin
| Pad No | Pad Name | ATTR | Description describe |
| 0 | GND | Power | Negative terminal of the power source |
| 1 | P23 | I/O | PWMN output script |
| 2 | P22 | I/O | PWMP output script |
| 3 | VCC | Power | Positive terminal of the power source |
| 4 | VOUT | Power | LDO output |
| 5 | P26 | I/O | Connect MICLDO (MIC power supply) |
| 6 | P25 | I/O | Connect MICN |
| 7 | P24 | I/O | Connect MICP |
| 8 | P00/P06 | I/O | IO/Serial Port/Download |
Circuit design reference
Design of MCU Peripheral Circuitry
