To support voice engines like Google Assistant or Amazon Alexa, the WCD9341 features dedicated hardware logic. The internal DSP runs a completely in the hardware domain. The primary application CPU remains in a deep sleep state until the specialized low-power microphones pass a valid keyword signature to the chip. Terminal Pin Configurations & Hardware Integration
The onboard digital signal processor (DSP) offloads heavy audio computations from the main application processor:
: Direct line-out and headphone amplification circuitry, removing the need for external op-amps. 📊 Qualcomm WCD9341 Technical Specifications wcd9341 datasheet
| Pin Group | Function | Key Pins | |-----------|----------|-----------| | Analog Inputs | MIC Bias, Line-in, Headset Mic | MICBIAS1, MICBIAS2, IN1P/N, IN2P/N | | Analog Outputs | HPH L/R, Line-out, Earpiece | HPH_L, HPH_R, LINEOUT_L/R, EAR_P/N | | Digital Audio | I2S, PCM, TDM | I2S_BCLK, I2S_LRCLK, I2S_DIN, I2S_DOUT | | Control | I2C (Slave) | I2C_SCL, I2C_SDA | | Power | Supply rails | VDD_IO (1.8V), VDD_A (1.8V), VDD_D (0.9V) | | Clock | Master clock | MCLK (19.2 MHz, 24 MHz, or 38.4 MHz) |
The WCD9341 was later followed by the and WCD9375 codecs. Although the newer parts offer lower power consumption, the WCD9341 actually outperforms them in some audio metrics: To support voice engines like Google Assistant or
| Metric | WCD9341 | WCD9375 | WCD9370 | | -------------------- | --------------- | ----------- | -------------- | | Dynamic Range (Playback) | | 123 dB | 120 dB | | THD+N (Playback) | −109 dB | −105 dB | −96 dB | | Dynamic Range (Recording) | 109 dB | 109 dB | 104 dB | | Hi‑Fi Power | 34 mW | 28.52 mW | 16.1 mW | | Low‑Power Listening | 6 mW | 6 mW | 6 mW | | Playback Resolution | 384 kHz/32‑bit | 384 kHz/32‑bit | 192 kHz/24‑bit |
I can provide target snippets or hardware design rules based on your project requirements. The is a highly integrated, low-power audio codec
The is a highly integrated, low-power audio codec designed by Qualcomm for use in premium mobile devices, IoT, and automotive infotainment systems. It is commonly paired with Qualcomm Snapdragon mobile platforms (e.g., Snapdragon 820, 821, 835, and 660). The device delivers high-fidelity (Hi-Fi) audio with advanced digital signal processing, supporting both playback and capture with extremely low noise and distortion.
Whether you are designing a high-end portable music player, repairing a classic smartphone, or simply curious about what makes flagship audio tick, mastering the WCD9341’s specifications is a rewarding challenge for any hardware or software audio engineer.