CH374

The DataSheet of CH374 (the first) 1 USB bus interface chip CH374 English DataSheet Version: 2 http://wch.cn http://wch-ic.com 1. Introduction CH374 is a USB bus universal interface chip, supports both USB-HOST and USB-DEVICE/SLAVE mode. There are three ports of HUB internal. It supports low-speed and full-speed control transfer, bulk transfer, interrupt transfer and synchronous/isochronous transfer. At local, there are 8-bit data bus and read, write, chip select control wire and interrupt output in CH374.It is convenient to link CH374 to controller system bus of DSP/MCU/MPU/microprocessors (uPs). Besides, CH374 supplies SPI serial communication mode to save pins. CH374 connects to MCU/DSP/MPU through 3-wire or 4-wire SPI serial interface and interrupt output. D [7-0] Local controller MCU DSP MPU etc Local controller DSP MCU MPU etc INT# CS# Interface chip CH374 Parallel interface A0 RD# WR# INT# SCS# CH374 Interface chip SPI interface SCK SDO ( CH374-SDI ) SDI ( CH374-SDO ) UD+ UD- Computer or USB devices Such as: USB printer USB flash drive Flash disk USB camera USB keyboard Etc. UD+ UD- Computer or USB device Such as: USB printer USB flash drive Flash disk USB camera USB keyboard Etc. The DataSheet of CH374 (the first) 2 2. Features ● Supports low-speed of 1.5Mbps and full-speed of 12Mbps, conforms to USB Specification Version 2.0, only needs crystal and capacitor as peripherals. ● Supports USB host interface and USB device interface, and supports exchangin...