WT2606A3-42N Voice Recognition Chip
160MHz AI Core · 3m Far‑Field · Dual 24‑bit 105dB DAC · Dual Mic ENC · QFN42
The WT2606A3-42N is a high‑performance, feature‑rich voice recognition chip designed for premium smart audio applications. Powered by a 160MHz 32‑bit core with advanced DNN‑based algorithms, it delivers 3‑meter far‑field recognition with interruptible wake‑up and continuous recognition for natural interaction. It integrates 2MB or 4MB SPI Flash, dual 24‑bit DAC with ≥105dB SNR and dual 24‑bit ADC with ≥95dB SNR, supporting high‑fidelity audio. The chip also features dual‑microphone ENC (environmental noise cancellation), Bluetooth, and a rich set of peripherals (UART, SPI, USB, SD card, GPIO, PWM). Housed in a compact QFN42 package, it is ideal for smart home appliances, toys, and industrial voice control.
- 160MHz CPU with FPU
- 3m far‑field reliable recognition
- Dual 24‑bit DAC – SNR ≥105dB
- Dual 24‑bit ADC – SNR ≥95dB
- Dual‑mic ENC noise cancellation
- Rich codec – MP3, FLAC, AAC, etc.
- Bluetooth integrated
- 2MB/4MB Flash options
WT2606A3-42N Key Features
Technical Specifications
| Parameter | Value / Condition |
|---|---|
| CPU Frequency | 160 MHz (with FPU) |
| Flash Memory | 2 MB or 4 MB (SPI) |
| DAC | Dual 24‑bit, SNR ≥ 105dB |
| ADC | Dual 24‑bit, SNR ≥ 95dB |
| Audio Decode Formats | MP2, MP3, WMA, APE, FLAC, AAC, M4A, WAV, OPUS |
| Audio Sample Rates (DAC) | 8kHz – 96kHz |
| Audio Sample Rates (ADC) | 8kHz – 48kHz |
| ENC | Dual‑microphone environmental noise cancellation |
| Bluetooth | Integrated (BR/EDR/BLE) |
| Supply Voltage | 2.2V – 4.5V |
| IO Level | 3.3V TTL (5V tolerant on some pins) |
| Interfaces | UART, SPI, USB 2.0 OTG, SD card, PWM, GPIO |
| Operating Temperature | –40°C ~ +85°C |
| Storage Temperature | –65°C ~ +150°C |
| Package | QFN42 (6×6 mm, 0.4mm pitch) |
Key Pin Functions – QFN42
| Pin | Name | Function |
|---|---|---|
| 0 | E‑GND | Exposed pad – must connect to ground |
| 2 | DC_SW | Internal buck converter – external inductor |
| 3 | VCC42 | Power input (2.2–4.5V) |
| 5 | VOUT | LDO output (capacitor to GND) |
| 7 | RX1 | UART1 receive |
| 8 | TX1 | UART1 transmit |
| 10 | BUSY | Playback status indicator |
| 12 | ANT | Bluetooth antenna |
| 13/14 | XIN/XOUT | 24MHz crystal |
| 15 | P38 | MIC pickup indicator / GPIO |
| 22/23 | ICEDAT/ICECLK | USB D+/D- (programming) |
| 30/31 | MIC2+/MIC1+ | Differential MIC inputs |
| 32 | MICLDO | MIC power supply |
| 33 | AGND | Analog ground |
| 35 | DACL | Left channel audio output |
| 36 | AECO | Echo cancellation reference |
| 40–42 | SD_CLK/CMD/DAT | SD card interface |
Full pinout includes UART2, SPI, additional GPIOs, and power rails. Refer to the datasheet for complete details.
Command Output Examples
| Command | UART Output (Hex) |
|---|---|
| Power‑on (auto) | 7E 06 FF 06 01 00 0C EF |
| Wake‑up: “小蜂管家” | 7E 06 FF 06 01 01 0D EF |
| “打开灯光” (Turn on light) | 7E 06 FF 06 01 02 0E EF |
| “关闭灯光” (Turn off light) | 7E 06 FF 06 01 03 0F EF |
| “调亮灯光” (Brighten) | 7E 06 FF 06 01 04 10 EF |
| “调暗灯光” (Dim) | 7E 06 FF 06 01 05 11 EF |
| 10s idle exit | 7E 06 FF 06 01 FF 0A EF |
Protocol: 7E + Length + Ext + Cmd + ID + Checksum + EF. Passive playback and volume control supported.
WT2606A3-42N Applications
Why Choose WT2606A3-42N
FAQs
What is the WT2606A3-42N?
A high‑performance voice recognition chip with 160MHz CPU, 3m far‑field, dual 24‑bit 105dB DAC, dual‑mic ENC, Bluetooth, and QFN42 package.
What audio formats are supported?
MP2, MP3, WMA, APE, FLAC, AAC, M4A, WAV, OPUS.
Does WT2606A3-42N support Bluetooth?
Yes, integrated Bluetooth 5.1 (BR/EDR/BLE).
What is the recognition range?
Up to 3 meters.
Can WT2606A3-42N do noise cancellation?
Yes, WT2606A3-42N supports dual‑microphone environmental noise cancellation (ENC).
What is the DAC performance?
Dual 24‑bit DAC with SNR ≥105dB, single‑ended or differential output.
What Flash sizes are available?
2MB or 4MB SPI Flash.
What interfaces does it have?
UART (x2), SPI, USB 2.0 OTG, SD card, PWM, GPIO, and more.
Note: The chip requires an external 24MHz crystal and a few passive components (inductor for DC‑DC, capacitors). Bluetooth antenna design is optional if Bluetooth is not used. For custom voice models and firmware, use the Waytronic online platform. Refer to the datasheet for full electrical and layout guidelines.
