USB1 and USB0
USB1 is a more common USB specification. Its high-speed mode transmission rate is 12Mbps. The low-speed mode transmission rate is 5Mbpsb, which means bit, 1MB/s megabytes/second = 8MBPS megabits/second, and 12Mbps=5MB/s. Currently, most MP3s are of this type of interface.
The USB0 specification evolved from the USB1 specification. Its transmission rate reaches 480Mbps, which translates to 60MB/s MB, which is enough to meet the speed requirements of most peripherals. The Enhanced Host Controller Interface EHCI in USB 0 defines a USB 1 compatible architecture. It can drive USB 1 devices with a USB 0 driver. In other words, all devices that support USB 1 can be used directly on the USB 0 interface without worrying about compatibility issues, and accessories such as USB cables, plugs, etc. can be used directly.
The change brought about by the use of USB for printer applications is a significant increase in speed. The USB interface provides a connection speed of 12 Mbps, which is 10 times higher than the parallel port speed. At this speed, the file transfer time is greatly reduced. The USB 0 standard further increases the interface speed to 480 Mbps, which is 20 times the normal USB speed, and greatly reduces the transfer time of print files.
USB is a commonly used pc interface. It has only 4 wires and two power supplies. Therefore, the signal is serially transmitted. The usb interface is also called serial port. The speed of usb0 can reach 480Mbps. Can meet a variety of industrial and civilian needs.
The output voltage and current of the USB interface are: +5V 500mA Actually there is an error, the maximum can not exceed +/-0.2V or 8-2V.
The four lines of the USB interface are generally assigned as follows: black line: gnd red line: vcc green line: data+ white line: data-
It should be noted that the positive and negative poles must not be reversed, otherwise the USB device or the south bridge chip of the computer will be burned.
Comparison of USB1 and USB0
USB1 and USB0
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