CH374 Datasheet - ETC

CH374 USB bus interface

VCC GND V3 XI XO UD+ UD- D7~D0 RD# WR# CS# INT# A0 ACT# UEN CKO RSTI RST RST# SLP POWER POWER POWER IN OUT USB signal USB signal Bi-directional tri-state IN IN IN Open drain OUT IN Open drain OUT IN OUT IN OUT OUT OUT Positive power input port, requires an external 0.1uF power decoupling capacita.

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 out.

CH374 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 exchanging USB-HOST and USB-DEVICE mode dynamically.

* CH374U has 3 p

CH374_ETC.pdf