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CH374 - USB bus interface

Datasheet Summary

Description

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

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 ports of ROOT-HUB internal, and supports 3 USB devices.
  • Supports control transfer, bulk transfer, interrupt transfer and synchronous/isochronous transfer of USB device with common low-speed and f.

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Datasheet preview – CH374

Datasheet Details

Part number CH374
Manufacturer ETC
File Size 204.91 KB
Description USB bus interface
Datasheet download datasheet CH374 Datasheet
Additional preview pages of the CH374 datasheet.

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Full PDF Text Transcription

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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.
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