Overview: The DataSheet of CH375 (the first) 1 USB Bus Interface Chip CH375 English DataSheet Version: 3E http://wch.cn 1. Introduction CH375 is a USB bus universal interface chip, supports USB-HOST Mode and USB-DEVICE/SLAVE Mode. 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 munication in USB-HOST mode. It connects with DSP/MCU/MPU through serial input, output and interrupt output.
The USB device mode of CH375 is patible 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 mon USB full-speed devices. Peripheral MCU can municate with USB device through CH375 according relevant USB protocol. The CH375 configures firmware of special munication 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. The local controller
MCU DSP MCU MPU etc D [7-0] INT# CS# The interface
chip CH375 A0 RD# WR# D+ D- puter or USB device
such as： USB printer
USB keyboard/mouse
USB flash external HD USB flash derive /flash etc 2.
