# A316-Codec-V1 USB Microphone Module Specification
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## 1. Product Introduction
### 1.1 Product Description
- The A316-Codec-V1 is a module designed specifically for USB microphone applications, integrating the XMOS XU316 processor and the high-performance 88L21 audio codec, providing excellent audio processing capabilities.
- The module features a high-precision DC-DC power circuit that outputs 3.3V, 1.8V, and 0.9V to power the XU316, requiring only a 5V external power input, which greatly simplifies the design complexity of the application board.
- The module supports external single-ended and differential microphone inputs, and provides stereo audio output, suitable for various audio recording and playback application scenarios.
- The module is equipped with 16Mbit Flash memory for storing audio firmware and system configurations, with support for firmware upgrade functionality.
- It provides a USB 2.0 interface, supporting both full-speed and high-speed modes, implementing USB Audio device functionality, compatible with various operating systems.
### 1.2 Product Features
- **USB Interface Features**
- USB 2.0 (Full-speed and High-speed modes)
- USB Audio Class 1.0/2.0 support
- USB Firmware Upgrade (DFU) functionality
- USB MIDI Device Class 1.0 support
- Asynchronous transfer mode, reducing clock jitter
- **Audio Input/Output Capabilities**
- Integrated NAU88L21 high-performance audio codec
- Support for single-ended and differential microphone inputs
- High-quality stereo audio output
- Built-in microphone preamplifier
- Support for multiple audio interface specifications
- 48KHz/24bit high-quality audio sampling
- **AI Noise Reduction**
- Elimination of various steady-state and non-steady-state noise
- Removal of microphone button sounds, keyboard sounds, footsteps, and other background noise
- High-fidelity voice output
- **System Compatibility**
- Support for multiple operating systems including Windows, Linux, Android, macOS, and iOS
- Plug-and-play, no additional drivers required (UAC 2.0 compatible systems)
- Suitable for conference systems, gaming headsets, professional recording equipment, and other applications
### 1.3 Product Block Diagram
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### 1.4 Specifications
| Specification Item | Description |
|:-----------------------|:---------------------------------|
| Product Name | A316-Codec-V1 |
| Product Description | USB Microphone and Audio I/O Module |
| Core Processor | XMOS XU316-1024-QF60BC24 |
| Audio Codec | NAU88L21 High-Performance Codec |
| Package Type | Compatible with SMT and Pin Header |
| Environmental Standard | RoHS Compliant |
### 1.5 Absolute Electrical Parameters
| Parameter | Min | Max | Unit |
|:-------------------------------------------|:-----:|:-----:|:----:|
| Storage Temperature | -40 | 125 | °C |
| Supply Voltage | -0.5 | 5.5 | V |
| ESD Voltage (Human Body Model) TAMB-25°C | -2 | 2 | KV |
| ESD Voltage (Machine Model) TAMB-25°C | -500 | 500 | V |
### 1.6 Normal Operating Conditions
| Function | Min | Typical | Max | Unit |
|:---------------------|:-----:|:-------:|:-----:|:----:|
| Operating Temperature| 0 | - | 70 | °C |
| Operating Voltage (Module Input) | 4.75 | 5.0 | 5.25 | V |
### 1.7 Operating Current
| Operating Status | Average | Peak | Unit |
|:-----------------|:-------:|:----:|:----:|
| Active@5.0V | 100 | 150 | mA |
## 2. Pin Definition
### 2.1 Pin Layout
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### 2.2 Pin Description
| Pin No. | Name | Type | Function |
|:-------:|:----------|:------|:---------------------------------|
| 1 | VBUS | P | 5V Power Input |
| 2 | GND | P | Module Ground |
| 3 | 1V8_O | O | 1.8V Power Output (Debug Only) |
| 4 | TDI | I | XTAG Debug PIN |
| 5 | TDO | O | XTAG Debug PIN |
| 6 | RST | I | System Reset, Active Low (Internal Pull-up) |
| 7 | TMS | I/O | XTAG Debug PIN |
| 8 | TCK | I | XTAG Debug PIN |
| 9 | X1D22 | I/O | Multi-function GPIO |
| 10 | 3V3_O | O | 3.3V Power Output (Debug Only) |
| 11 | DM | I/O | USB Data Negative |
| 12 | DP | I/O | USB Data Positive |
| 13 | VBUS | P | 5V Power Input |
| 14 | GND | P | Module Ground |
| 15 | GND | P | Module Ground |
| 16 | VBUS | P | 5V Power Input |
| 17 | HP_R | O | Headphone Right Channel Output |
| 18 | HP_L | O | Headphone Left Channel Output |
| 19 | X0D33 | I/O | Multi-function GPIO |
| 20 | X0D32 | I/O | Multi-function GPIO |
| 21 | X0D31 | I/O | Multi-function GPIO |
| 22 | X0D30 | I/O | Multi-function GPIO |
| 23 | X0D43 | I/O | Multi-function GPIO |
| 24 | X0D41 | I/O | Multi-function GPIO |
| 25 | X0D42 | I/O | Multi-function GPIO |
| 26 | MIC_BIAS | O | Microphone Bias Voltage Output |
| 27 | MIC_P | I | Microphone Positive Input |
| 28 | MIC_N | I | Microphone Negative Input |
*Note: I/O type definitions: I=Input, O=Output, P=Power, I/O=Input/Output*
## 3. Module Dimensions and PCB Package Layout
### 3.1 Module Dimensions
PCB Dimensions: 18.0±0.2(L)X35.16±0.2(W)X1.0±0.1(H) mm
### 3.2 Module Package Layout
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## 4. Typical Application Schematic
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This schematic shows the typical connection method of the A316-Codec-V1 module in USB microphone applications. The module connects to a host device (such as a computer or mobile phone) via USB interface, enabling bidirectional digital audio transmission. Externally, only a 5V power input is needed, with the module's internal DC-DC power management circuit automatically converting to the working voltages required by the XU316 and 88L21. The microphone input port supports connection to single-ended or differential microphones, and the stereo output can connect to headphones. The integrated high-performance codec ensures audio quality while simplifying external circuit design.
## 5. Product Packaging Information
Tray + Outer Box Packaging
## 6. Recommended Reflow Soldering Temperature Profile
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