CH374 is a universal interface chip for USB bus, supports USB-HOST mode and USB-DEVICE/SLAVE mode, has 3-port root HUB, supports low-speed and full-speed control transmission, bulk transmission, interrupt transmission and synchronous/isochronous transmission. At the local side, CH374 has an8-bit data bus, a read, write and chip selection control line and an interrupt output, and can be easily hooked to the system bus of DSP/MCU/MPU and other controllers. In addition, CH374 also provides SPI serial communication mode saving I/O pins, being connected with DSP/MCU/MPU through 3-line or 4-line SPI serial interface and interrupt output.
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