CH376 is a chip that helps manage files on USB flash drives or SD cards. It supports different communication interfaces, like 8-bit parallel port, SPI interface, or asynchronous serial port. This chip can be controlled by controllers like MCU/DSP/MPU to access files on U disk or SD card, or communicate with a computer.
Features

Supports 1.5Mbps low speed and 12Mbps full speed USB communication
Compatible with USB V2.0; peripheral components only require crystal and capacitor
Supports USB-HOST host interface and USB-DEVICE device interface
Allows dynamic switching between host mode and device mode
Supports control transfer, bulk transfer, and interrupt transfer of USB devices
Automatically detects connection and disconnection of USB devices, providing event notifications
Provides a 6MHz SPI host interface, supporting SD card, MMC card, and TF card compatible with its protocol
Built-in USB control transfer protocol processor for simplifying common control transfers
Handles dedicated communication protocols for mass storage devices
Supports USB storage devices with Bulk-Only transport protocol and SCSI, UFI, RBC, or equivalent command set
Built-in FAT16, FAT32, and FAT12 file system management firmware
Supports U disk and SD card with a capacity of up to 32GB
Provides file management functions such as opening, creating, or deleting files, enumerating and searching files, creating subdirectories, and supporting long file names
Offers file read and write functions for multi-level subdirectories in units of bytes or sectors
Includes disk management functions like initializing disk, querying physical capacity, querying remaining space, and reading and writing physical sectors
Provides a 2MB speed 8-bit passive parallel interface for connecting to a single-chip microcomputer
Offers a 2MB/24MHz speed SPI device interface for connecting to a single-chip microcomputer via SPI serial bus
Provides an asynchronous serial port with up to 3Mbps speed, supporting a serial interface connected to a single-chip microcomputer with dynamic baud rate adjustment
Supports 5V, 3.3V, and 3V supply voltages, including low power mode
Fully compatible with CH372 chip in USB device mode; basically compatible with CH375 chip in USB host mode
Available in SOP-28 package