AW-CH397 802.11ac/nbg WiFi+BT+NFC SiP Module

1. Introduction and Overview

The AzureWave AW-CH397 is an advanced System-in-Package (SiP) module designed for integration into various mobile devices, including notebooks, tablets, and gaming devices. This compact module provides comprehensive wireless connectivity solutions, incorporating IEEE 802.11ac/a/b/g/n 2x2 MIMO WLAN, Bluetooth, and NFC functionalities.

Its design prioritizes small form factor, low power consumption, and versatile interface support, making it an ideal choice for embedded applications requiring robust wireless communication. The AW-CH397 facilitates rapid development cycles and quick time-to-market for products leveraging its integrated capabilities.

2. Product Features

• Compact Footprint: Measures 10.0mm(L) x 12.3mm(W) x 1.0mm(H) Max, enabling integration into space-constrained designs.
• Multiple WLAN Interfaces: Supports SDIO3.0, G-SPI, and USB interfaces for WLAN connectivity.
• Versatile Bluetooth Interfaces: Features high-speed UART, PCM/Inter-IC Sound (I2S), SDIO3.0, and USB for Bluetooth.
• Bluetooth 4.0 Compliance: Fully compliant with Bluetooth 4.0, backward compatible with Bluetooth 2.1 + Enhanced Data Rate (EDR).
• Audio Codec Interface: Includes support for audio codec integration.
• Cellular Phone Co-existence: Designed to operate efficiently alongside cellular phone modules.
• Power Saving Modes: Multiple power saving modes are available for optimized low power consumption.
• Advanced Security: Supports IEEE 802.11i for enhanced wireless security.
• Quality of Service (QoS): Provides QoS support for multimedia applications, ensuring smooth data flow.
• Linux Driver Support: Drip-in WLAN Linux drivers are Android ready and validated on Android-based systems, supporting Linux kernel versions up to 2.6.32.
• BlueZ Bluetooth Profile Support: Compatible with BlueZ v4.47 Bluetooth profiles stack used in Android Éclair.
• Simultaneous AP-STA: Supports simultaneous Access Point (AP) and Station (STA) modes.
• China WAPI Support: Includes support for China's Wireless LAN Authentication and Privacy Infrastructure (WAPI).
• Lead-free Design: Environmentally conscious lead-free design.
• Marvell 88W8897 Chipset: Utilizes the Marvell 88W8897 chipset for core functionalities.

3. Setup and Integration

The AW-CH397 is a System-in-Package (SiP) module intended for integration into a larger electronic system. Its setup primarily involves proper hardware integration and software driver installation within the host device.

Figure 3.1: The Azurewave AW-CH397 SiP Module, a compact component for wireless communication.

3.1 Hardware Integration

Integration requires careful adherence to the module's datasheet and design guidelines provided by Azurewave. Key considerations include:

• Power Supply: Ensure stable and correct voltage supply as specified in the module's power requirements.
• Interface Connections: Connect the appropriate interfaces (SDIO, USB, UART, PCIe) from the host system to the module. Refer to the pinout diagram in the official datasheet for correct connections.
• Antenna Design: Proper antenna selection and placement are crucial for optimal Wi-Fi and Bluetooth performance. Consider impedance matching and signal isolation.
• Thermal Management: While low power, ensure adequate thermal dissipation if the module is integrated into a confined space or high-temperature environment.

3.2 Software Driver Installation

For the module to function correctly, the host operating system requires appropriate drivers. Azurewave provides Linux drivers that are Android-ready.

• Linux/Android Systems: Utilize the provided drip-in WLAN Linux drivers. These drivers are validated on Android-based systems and support Linux kernel versions up to 2.6.32.
• Bluetooth Stack: For Bluetooth functionality, ensure compatibility with the BlueZ v4.47 Bluetooth profiles stack, commonly used in Android Éclair and similar Linux environments.
• Driver Compilation: Depending on the specific Linux distribution or Android version, driver compilation may be required. Follow the instructions provided with the driver package.

4. Operating the Module

Once integrated and drivers are installed, the AW-CH397 module operates as a standard Wi-Fi, Bluetooth, and NFC component within the host system. Its operation is managed by the host device's operating system and applications.

4.1 Wi-Fi Operation

• Network Connection: The host system's network manager will detect available Wi-Fi networks. Users can connect to desired networks using standard procedures.
• Security: Supports WPA, WPA2, and IEEE 802.11i security protocols. Ensure the host system's software is configured to utilize these for secure connections.
• AP-STA Mode: The module supports simultaneous Access Point (AP) and Station (STA) modes, allowing the device to act as both a Wi-Fi client and a hotspot concurrently, if supported by the host software.

4.2 Bluetooth Operation

• Device Pairing: Use the host system's Bluetooth settings to discover and pair with other Bluetooth-enabled devices (e.g., headphones, keyboards, other mobile devices).
• Profile Support: The module supports various Bluetooth profiles via the BlueZ stack, enabling functionalities like audio streaming (A2DP), data transfer (SPP), and human interface device (HID) connections.

4.3 NFC Operation

• Proximity Communication: NFC functionality allows for short-range, high-frequency wireless communication. This is typically used for quick pairing, data exchange, or contactless payments, depending on the host system's implementation.
• NFC Antenna: Ensure the NFC antenna, if external, is properly connected and positioned for optimal performance.

5. Maintenance

As an embedded System-in-Package (SiP) module, the AW-CH397 requires minimal direct user maintenance. Maintenance primarily pertains to the host system it is integrated into.

• Firmware Updates: Any firmware updates for the module would typically be provided by the host device manufacturer as part of a system software update. Users should follow the host device's update procedures.
• Environmental Conditions: Ensure the host device operates within specified environmental conditions (temperature, humidity) to prevent damage to the module and other components.
• Physical Handling: Avoid exposing the host device to excessive shock, vibration, or moisture, which could damage internal components, including the AW-CH397 module.
• Software Updates: Keep the host operating system and relevant drivers updated to ensure optimal performance and security for the wireless functionalities.

6. Troubleshooting

If you encounter issues with the AW-CH397 module's functionality, consider the following troubleshooting steps. Note that most issues will be related to the host system's configuration or environment.

6.1 Wi-Fi Connectivity Issues

• No Wi-Fi Networks Detected:
  • Verify Wi-Fi is enabled in the host system's settings.
  • Check if the Wi-Fi driver is correctly installed and running.
  • Ensure the Wi-Fi antenna is properly connected and not obstructed.
  • Restart the host device.
• Unable to Connect to a Network:
  • Double-check the Wi-Fi password.
  • Ensure the network is within range and has a strong signal.
  • Restart your Wi-Fi router/access point.
  • Temporarily disable any firewall or antivirus software on the host device to rule out interference.

6.2 Bluetooth Pairing/Connection Issues

• Device Not Discoverable:
  • Ensure Bluetooth is enabled on both the host device and the target device.
  • Put the target Bluetooth device into pairing mode.
  • Check the Bluetooth driver status on the host system.
• Connection Drops Frequently:
  • Reduce the distance between the host device and the Bluetooth accessory.
  • Remove any physical obstructions between devices.
  • Check for interference from other 2.4GHz devices (e.g., Wi-Fi routers, cordless phones).

6.3 General Issues

• Module Not Recognized:
  • Verify proper hardware integration and connections.
  • Reinstall or update the module's drivers.
  • Check the host system's device manager or system logs for errors.
• Performance Issues:
  • Ensure the host system meets the minimum requirements for the module's operation.
  • Close unnecessary applications on the host device.
  • Check for background processes consuming resources.

If issues persist, consult the host device's manufacturer support or the official Azurewave documentation for the AW-CH397 module.

7. Specifications

8. Warranty Information

The Azurewave AW-CH397 is an OEM (Original Equipment Manufacturer) component. Warranty coverage for this module is typically provided by the manufacturer of the end-product in which it is integrated, or by the distributor from whom the module was purchased.

Please refer to the warranty documentation provided with your complete device or contact your supplier for specific warranty terms and conditions. Azurewave's direct warranty may apply only to bulk purchases by manufacturers.

9. Support and Contact

For technical support, driver updates, or detailed integration guides related to the AW-CH397 module, it is recommended to:

• Contact the Manufacturer of Your Device: If the AW-CH397 is part of a larger product (e.g., a tablet or laptop), the device manufacturer is your primary point of contact for support, as they are responsible for the overall system integration and software.
• Contact Your Supplier/Reseller: If you purchased the module directly as a component, reach out to the supplier or reseller for technical assistance and access to documentation.
• Azurewave Official Resources: For direct inquiries or to access public documentation, visit the official Azurewave website. Look for a "Support" or "Downloads" section.

Always provide your product's model number (AW-CH397) and any relevant system information when seeking support.