CH374 Description
The DataSheet of CH374 (the first) 1 USB bus interface chip CH374 English DataSheet Version: 2 http://wch.cn http://wch-ic. Introduction CH374 is a USB bus universal interface chip, supports both USB-HOST and USB-DEVICE/SLAVE mode.
CH374 Key Features
- Supports low-speed of 1.5Mbps and full-speed of 12Mbps, conforms to USB Specification Version 2.0, only needs crystal an
- 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 mon
- Automatically detects connection and disconnection of either low-speed or full-speed device, and gives out interrupt inf
- Sets impedance matching serial resistor of USB signal wire, pull-up resistor of USB device endpoint and pull-down resist
- Two kinds MCU interface are optional: 8-bit passive parallel interface with 6MB and SPI serial interface with 2.7MB/22MH
- Parallel interface contains 8-bit data bus, 1-bit address wire and 3-wire to control. The control wires are chip select
- Parallel interface only occupies 2-bit address: index address port and data port. After reading and writing data port, i
- SPI serial interface contains SPI chip select, serial clock, serial input/output, and supports parallel connecting input