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USB Bus Interface Chip CH375 |
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| 1. Introduction |
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CH375 is a USB bus universal interface chip,supports USB-HOST Mode and USB-DEVICE/SLAVEMode.There are 8-bit data bus and read,write,chip select control wire and interrupt output in CH375.It is convenient to link CH375 to control system bus of MCU/DSP/MPU.CH375 also provides serial communication in USB-HOST mode.It connects with DSP/MCU/MPU through serial input,output and interrupt output.
The USB device mode of CH375 is compatible with CH372,and CH375 incorporates all functions of CH372.For USB-DEVICE/SLAVE mode operation and specification,please refer to the CH372 specification.This data sheet only covers USB-HOST mode operation.
The USB-HOST mode of CH375 supports common USB full-speed devices.Peripheral MCU can communicate with USB device through CH375 according relevant USB protocol.The CH375 configures firmware of special communication protocol inside which can deal with Mass-Storage.Peripheral MCU can read and write general USB store devices (including USB HD, USB flash and USB flash drive)directly while sector as unit. |
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●Full-speed USB-HOST interface,conforms to USB Specification Version 2.0,only needs crystal and capacitance external.
●Full-speed USB device interface,compatible with CH372,supports exchanging USB-HOST mode and USB-DEVICE/SLAVE mode dynamically.
●Input and output buffers of host endpoint occupy 64-byte respectively,supports common full-speed USB device with 12Mbps and low-speed device with 1.5Mbps.
●Supports USB device control transfer,bulk transfer and interrupt transfer.
●Detects USB device plug and unplug automatically and sends message to USB host.
●Configures protocol processor control transfer inside to simplify usual control transfer.
●Set up firmware of special communication protocol to do with Mass-storage.Supports Bulk-Only transfer protocol and USB storage device of SCSI,UFI,RBC and other equivalent storage device which accommodates the minimum set of command including USB HD,USB flash and USB flash drive.
●Reaches MCU reads and writes the file of USB storage device through file layer subprogram in USB flash drive.
●Parallel interface contains 8-bit data bus and 4 control wires i.e. read,write,chip select input and interrupt output.
●Serial contains serial input,output and interrupt.Adjusts communication baud rate dynamically.
●Source power is 5V or 3.3V,and low-power mode is supported.
●Adoption SOP-28 lead-free package,compatible with RoHS,supplies diversion board from SOP28 to DIP28,the pins are compatible with CH374. |
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| 3. Package |
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| 4. Pins |
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CH374DS1.PDF
The DataSheet about CH374
USB-HOST&
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CH372DS1.PDF
The English DataSheet about CH372 or
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