CH376T

CH376 is a file management control chip, which is used for MCU system to read and write files in USB flash disk or SD card. CH376 supports USB device mode and USB host mode, has the basic firmware of the USB communication protocol, the firmware for processing the special communication protocol of Mass- Storage device, the SD card communication interface firmware and the management firmware of FAT16 and FAT32 and FAT12 file systems, and supports the common USB storage devices (including USB flash disk/USB hard disk, USB flash drive/USB card reader) and SD card (including standard capacity SD card and high capacity HC- SD card as well as protocol compatible MMC card and TF card). CH376 supports three communication interfaces: 8- bit parallel port, SPI interface or asynchronous serial interface. Controllers such as DSP/MCU/MPU can control CH376 through any of the above communication interfaces, access files in USB flash disk or SD card or communicate with the computer. The USB device mode of CH376 is fully compatible with CH372, and the USB host mode of CH376 is basically compatible with CH375.

Key features

• Support 1.5Mbps low- speed and 12Mbps full- speed USB communication, compatible with USB V2.0; only crystals and capacitors are required for peripheral components.
• Support USB- HOST interface and USB- Device interface, and support dynamic mode switching between HOST and DEVICE.
• Support USB device control transmission, bulk transmission and interrupt transmission.
• Automatically detecting the connection and disconnection of USB device, and providing event notifications for device connection and disconnection.
• Provide 6MHz SPI host interface, and support SD card as well as MMC card and TF card compatible with its protocol.
• Built- in USB control transmission protocol processor simplifies common control transmission.
• The built- in firmware processes special communication protocols for mass storage devices, and supports BULK- Only transport protocol and USB storage devices (including USB flash disk/USB hard disk/USB flash drive/USB card reader) with SCSI, UFI, RBC or equivalent command sets.
• The management firmware with FAT16, FAT32 and FAT12 file systems supports 32GB USB flash disk and SD card.
• Provide file management functions: open, create or delete files, enumerate and search files, create subdirectories, and support long filenames.
• Provide file read- write function: read and write files in the multi- level subdirectories in bytes or sectors.
• Provide the disk management function: initialize the disk, inquire the physical capacity, inquire the free space, read and write physical sectors.
• Provide a 2MB 8- bit passive parallel interface and support the parallel data bus connected to MCU.
• Provide 2MB/24MHz SPI device interface, and support SPI serial bus connected to MCU.
• Provide the asynchronous serial interface with the maximum speed of 3Mbps, support the serial port connected to MCU, and support the dynamic adjustment of communication baud rate.
• Support supply voltage of 5V, 3.3V and 3V as well as low power mode.
• The USB device mode is fully compatible with CH372; the USB host mode is basically compatible with CH375 chip.
• Provide SOP- 28 and SSOP20 lead- free package, be compatible with RoHS, provide SOP28 to DIP28 conversion board, and SOP28 package pin is basically compatible with CH375.