USB Android Type C Data Transmission Nylon CD01 Phone Data Cables

USB Lightning USB Android Type-C Data Transmission Nylon Cables

Basic type

1. COM interface

The COM interface is also called the serial port. In the past, most motherboards provided two COM ports, namely COM1 and COM2. The function of the COM interface is to connect devices such as serial mouse and external Modem. The 1/ O address of the COM1 interface is 03F8h-03FFh, the interrupt number is IRQ4: the 1O address of the COM2 interface is O2F8h- O2Fh, and the interrupt number is IRQ3. Therefore, the COM2 interface has priority over the response of the COM1 interface. Later, the mouse and other serial devices adopted the PS2 interface and the currently popular USB interface, and serial-based external devices have become rare.

2. USB interface

The full name of USB is Universal Serial Bus, which means "Universal Serial Bus" in Chinese. USB was jointly proposed by Intel, Compaq, IBM, Microsoft and other companies at the end of 1994. USB supports hot-plugging, and its plug-and-play advantage makes it the most important interface method for computers.

Description of USB data cable

The USB interface has 4 pins, which are USB power ( usually 5V ), USB data line +, USB data line and ground. USB has two specifications, namely USBI.1 and USB2.0. The transmission rate of the high-speed mode of USB I.1 is 12Mbit/ s, and the transmission rate of the low- speed mode is 1.5 Mbit/ s, 1 Mb/ s = 8 Mbit/ s, 12 Mbit/ s = 1.5 MB/ s. The USB 2.0 specification is evolved from the USBI.1 specification. Its transmission rate has reached 480Mbit/s, which is converted into MB to 60MB/s, which is sufficient to meet the rate requirements of most peripherals. The " Enhanced Host Controller Interface in USB2.0 defines an architecture compatible with USB1.1, which can drive USB.1 devices with USB2.0 drivers. In other words, all devices that support USB1.1 can be used directly on the USB2.0 interface without worrying about compatibility issues, and accessories such as USB cables and plugs can also be used directly.