ماژول USB HOST CH374U 3 PORT

●Supports 1.5Mbps low-speed and 12Mbps full-speed USB communication, compatible with USB V2.0, peripheral components only need crystals and capacitors.
● Supports USB-HOST host interface and USB-DEVICE device interface, and supports dynamic switching between host mode and device mode.

● The CH374U chip has a built-in 3-port USB root hub ROOT-HUB, which can connect and manage 3 USB devices at the same time.

● Supports control transmission, batch transmission, interrupt transmission, isochronous / isochronous transmission of commonly used low-speed and full-speed USB devices.

● Automatically detect the connection and disconnection of low-speed and full-speedUSB devices, and provide interrupt notification of device connection and disconnection.

● Built-in impedance matching series resistance of USB signal line, pull-up resistor on USB device side, pull-down resistor on USB host side.

● Two kinds of single-chip microcomputer interfaces are optional: 8-bit passive parallel interface with 6MB speed and SPI serial interface with 3.5MB / 28MHz speed.

● The parallel interface includes an 8-bit data bus, a 1-bit address, and a 3-wire control: chip select input, writestrobe, and optional read strobe.

● The parallel interface only occupies two address bits: the index address port and the data port. The internal index address is automatically incremented after reading and writing the data port.

● SPI serial interface includes SPI chip select, serial clock, serial input and output, and SPI output and input can be connected in parallel.

● The interrupt output pin is an optional connection and is active low. It can be replaced by polling the interrupt flag bit in the register.

● Provide auxiliary functions: programmable clock output, power-on reset output, and optional watchdog reset.

● Provides U-disk file-level subroutine library that supports FAT12 / FAT16 / FAT32 file system, so that the microcontroller can read and write U-disk files.

● Support 5V power supply voltage, 3.3V power supply voltage and even 3V power supply voltage.Built-in HUB to connect 3 devices (below)The CH374U chip has a built-in three-port root hub Root-HUB. When it is used as a USB-Host, it can be connected to three