CH376S USB Module U Disk Read Write Module

CH376S USB Module U Disk Read Write Module is a versatile and highly integrated file management solution that allows microcontrollers to interface with USB flash drives and SD cards seamlessly. This module utilizes the powerful CH376S chip, which supports USB-Host mode and USB-Device mode while handling the complex FAT12, FAT16, and FAT32 file systems internally. Consequently, developers no longer need to write extensive code for low-level file handling, as the module processes commands for creating, reading, and deleting files automatically. Furthermore, the board offers multiple communication interfaces including SPI, UART, and an 8-bit parallel bus, providing immense flexibility for various hardware architectures. Therefore, you can easily add high-capacity data logging or external storage capabilities to any Arduino, STM32, or PIC project without exhausting the host controller’s processing power.

Key Features:

• Comprehensive File System Support: The chip natively manages FAT12, FAT16, and FAT32 structures, allowing immediate compatibility with standard PC-formatted storage media.
• Multi-Interface Flexibility: Users can choose between high-speed SPI, asynchronous serial (UART), or a traditional 8-bit parallel interface to match their specific system requirements.
• Dual Storage Support: This module supports both USB flash drives (U-disks) and SD cards, providing multiple options for external data storage and retrieval.
• Integrated Management: The hardware handles the heavy lifting of sectors and clusters; however, the user simply sends high-level commands like “File Open” or “File Write” to manipulate data.
• Low Power Operation: Features a built-in sleep mode that reduces current consumption when the storage device is not in active use.

Technical Specifications:

• Operating Voltage: 5.0 V or 3.3 V (Selectable via jumper or power input)
• USB Interface: USB 2.0 compliant (Host and Device modes)
• Serial Baud Rate: Supports up to 921600 bps for high-speed data transfers.
• SPI Speed: Supports up to 2 MHz clock frequency.
• File System Compatibility: FAT12, FAT16, and FAT32
• Operating Current: ≈ 30 mA during active read/write operations.
• Logic Level: 3.3 V CMOS (5 V tolerant inputs)

Mechanical Specifications:

• On-Board Components: Includes a 12 MHz crystal oscillator for stable timing and a power indicator LED.
• Connector Types: Standard USB Type-A female port for U-disks and a separate header for SD card modules or wiring.
• Build Quality: Features a high-quality dual-layer PCB with tinned through-holes for easy soldering or header installation.

Dimensions:

• Board Length: ≈ 50 mm
• Board Width: ≈ 34 mm
• Height: ≈ 12 mm (Including the USB port height)
• Weight: ≈ 11 g

Pinout and Wiring:

• TXD/RXD: Connect these pins to the microcontroller’s UART interface for serial communication.
• SCS/SDO/SDI/SCK: Connect these pins when utilizing the SPI bus protocol for faster data throughput.
• GND: Common ground connection for the power supply and logic signals.
• VCC: Power input (typically 5 V) to drive the USB bus and the storage media.
• INT#: Interrupt output pin that signals the host controller when a storage device is inserted or a command completes.

Datasheet Reference:

• Download CH376S File Management Control Chip Datasheet

Commonly Used in:

• Data Acquisition Systems: Recording sensor data directly to a portable USB drive for later analysis on a computer.
• Industrial Control: Storing configuration files or firmware updates on external media for easy onsite system maintenance.
• MP3 Players: Serving as the interface for reading audio files from flash drives in DIY music projects.

Applications:

• Portable Data Loggers: Building rugged devices that save environmental or mechanical data without needing a constant PC connection.
• CNC Machines: Reading G-code files from a USB stick to control motors and actuators in standalone workshop equipment.
• Security Systems: Saving event logs or captured images to removable storage in localized monitoring stations.

Equivalent Models:

• CH375 USB Module: An older version that supports USB-Host mode but lacks the integrated FAT file system management found in the CH376S.
• SL811HST: A standalone USB host controller chip; however, it requires much more complex software drivers compared to the CH376S.
• VDIP1 (Vinculum-II): A high-end USB host controller module that offers similar file management features for professional embedded designs.

Package Includes:

• 1 x CH376S USB Module U Disk Read Write Module