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The WCD9341 is controlled via I²C at 400 kHz max (no fast-mode plus). The datasheet lists 256 8-bit registers, but critical ones include:
| Address | Name | Function |
|---------|------|----------|
| 0x01 | CDC_CLK_RST_CTRL | Master clock divider (1–64) |
| 0x12 | DAC_PATH_CTRL | DAC enable, DSD/PCM mode |
| 0x23 | HPH_GAIN_CTRL | 0 to +6 dB (1 dB steps) |
| 0x34 | ADC_GAIN_CTRL | –12 to +30 dB (0.5 dB steps) |
| 0x5A | DSD_CONFIG | DSD filter bandwidth (50/100/200 kHz) |
| 0x78 | CLASSH_CONFIG | Class-H attack/release time (0.5–8 ms) |
Missing in public datasheet:
The WCD9341 datasheet is not publicly available due to Qualcomm’s proprietary distribution policy. Access typically requires:
Unofficial summaries exist from reverse engineering (e.g., from LineageOS or AOSP hardware code), but for hardware design, you must obtain the official document.
Based on typical application notes paired with the WCD9341 datasheet, integrating this codec into a custom PCB requires attention to:
The WCD9341 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.
The WCD9341 is not just a simple converter; it is a comprehensive audio solution. The datasheet outlines several integrated subsystems that reduce the need for external components.
1. Assert RESET low, wait t_RST_LOW (datasheet)
2. Deassert RESET, wait t_RST_HIGH
3. Enable VDD and VGL/VGH regulators in specified order
4. Delay per t_PWR_STABLE
5. Send register block: interface config, display timing, gamma LUT
6. Enable backlight with ramped PWM duty cycle
7. Set display on command
(Replace timing values with exact numbers from the WCD9341 datasheet for your revision.)
Use the datasheet to verify the specific measured values, test conditions, and recommended external components. The checklist and lab steps above will help translate datasheet claims into real-world performance. If you want, I can:
Related search suggestions provided.
Qualcomm Aqstic WCD9341 is a high-tier discrete audio codec designed to provide Hi-Fi audio experiences in flagship mobile devices, most notably integrated with the Snapdragon 835 Mobile Platform
. It is widely used in professional repair for smartphones like the Samsung Galaxy S8, Note 8, and Note 9 wcd9341 datasheet
to resolve issues such as distorted sound, dead speakers, or muffled microphones. Key Technical Specifications
is engineered for audiophile-grade performance with the following core capabilities: Audio Quality : Supports up to 384-kHz/32-bit PCM audio playback. DSD Support : Features native Direct Stream Digital (DSD64/DSD128)
decoding, eliminating the need for signal conversion to PCM. Dynamic Range : Offers a high dynamic range of for pure, premium sound. Active Noise Cancellation (ANC)
: Includes a dedicated hardware block to process ANC algorithms, allowing for battery-free ANC headsets that draw power directly from the phone. Form Factor 154-pin SMD IC
designed for high-precision BGA soldering on mobile motherboards. Common Applications and Compatibility While primarily known for its debut in the Samsung Galaxy S8
, it is a standard component for repairing several high-end models: Samsung Series
: Galaxy S8 / S8 Plus, S10 series, Note 8, Note 9, and Note 10 series. Other Devices : Integrated into devices like the Xiaomi Mi Note 2 to achieve their highly-rated audio quality. Repair and Replacement Parts
If you are looking for replacement chips for sound fault repairs, they are available from various specialized retailers: WCD 9341 Audio IC For Sound Fault Repair : Available at for approximately ₹99.00 WCD9341 IC : Offered by Akinfo Tools at ₹53.00 Replacement Audio Codec IC for Samsung Galaxy S8/Note 8 : Listed at Macfactory for ₹299.00 to ₹349.00 depending on the specific batch. Note for Technicians:
Overview
The WCD9341 is a low-power, high-fidelity audio codec chip that supports a wide range of audio applications, including smartphones, tablets, laptops, and portable audio devices. It features a high-performance digital-to-analog converter (DAC) and an analog-to-digital converter (ADC) with a high signal-to-noise ratio (SNR).
Key Features
Technical Specifications
Functional Block Diagram
The WCD9341 consists of the following functional blocks:
Applications
The WCD9341 is suitable for a wide range of audio applications, including:
Package and Pinout
The WCD9341 is available in a small package (e.g., WLCSP) with a compact pinout.
Conclusion
The WCD9341 is a high-performance audio codec chip that offers a range of features and benefits for audio applications. Its high-fidelity audio playback and recording capabilities, low power consumption, and flexible audio interfaces make it an attractive solution for device manufacturers.
If you'd like more information or have specific questions, feel free to ask!
No specific math was used; therefore, no $$Math$$ is shown.
The WCD9341 is a high-performance audio codec developed by Qualcomm, famously marketed as part of their Aqstic audio technology platform. It is designed to provide high-fidelity (Hi-Fi) audio experiences for premium mobile devices, such as smartphones and tablets. Core Technical Specifications
The WCD9341 is engineered to meet audiophile-grade standards directly within mobile hardware: The WCD9341 is controlled via I²C at 400
High-Resolution Audio Support: It supports PCM audio up to 384-kHz/32-bit and offers native support for DSD (Direct Stream Digital) playback.
Dynamic Range: Features a high dynamic range of 123 dB, ensuring clear differentiation between the quietest and loudest sounds.
Audio Quality: It boasts low THD+N (Total Harmonic Distortion + Noise) performance, minimizing signal degradation during playback.
Interface Connectivity: The chip often interfaces via SLIMbus, UART, and PCM for audio data transmission within a mobile system-on-chip (SoC) architecture. Device Integration
The WCD9341 is typically paired with high-end Qualcomm Snapdragon processors to handle complex audio processing tasks. Common pairings include:
Snapdragon 835: This was the flagship pairing that introduced Aqstic technology to a wide audience.
Snapdragon 670 and 710: These mid-to-high tier chipsets often utilize the WCD9341 to provide premium audio features in more accessible devices.
Popular Smartphones: You can find this IC in notable devices like the Samsung Galaxy S8, Note 8, and Note 9, as well as the Xiaomi Mi Note 2. Use Cases and Repair
In the mobile industry, the WCD9341 is a critical component for:
Hi-Fi Music Playback: Delivering studio-quality sound to wired headphones.
Replacement & Repair: It is a common part for technicians. If a phone experiences complete audio loss, distorted sound, or microphone failure, the WCD9341 IC is often the targeted component for replacement.
This is a deep technical review of the Qualcomm WCD9341, based on its public-facing datasheet and supplementary audio codec architecture documents. The WCD9341 is a high-performance audio codec IC typically paired with Snapdragon 820, 821, 835, and 660/630-series mobile platforms. The WCD9341 datasheet is not publicly available due
Disclaimer: The full NDA-protected datasheet (e.g., 80-NL713-XX) contains register maps and timing diagrams not publicly available. This review synthesizes information from authorized summary datasheets, developer blogs, and reverse-engineering community insights as of 2026.
In mobile devices, power efficiency is paramount. The WCD9341 employs several strategies to minimize power draw: