3. Hardware Description
PC-686BX(NLX)-LV, PC-686BX(NLX)-LVV
19
USB Connector: CN4
The universal serial bus (USB) is able to automatically detect plug and play computer
peripherals (such as a keyboard, mouse, joystick, scanner, printer, modem/ISDN, CD-
ROM, or floppy disk drive) when they are physically connected without the need to
reboot or install a driver.
The USB connector can be used to connect any of a number of USB devices to the
computer. Normally, the device driver for the USB device is managed by the
operating system (OS). However, as keyboard and mouse support is required for the
Setup program before the operating system (OS) boots, the BIOS also supports a USB
keyboard and mouse.
The CPU board has two USB ports and one USB peripheral can be connected to each
port. To connect three or more USB devices, an external hub can be connected to
either of the USB ports.
The CPU includes full support for the universal host controller interface (UHCI) and
uses UHCI compatible software drivers.
The USB functions are as follows.
- Self-identifying peripheral devices can be plugged in while
computer is running (USB Ver.1.1)
- Automatic mapping to driver and configuration functions
- Supports synchronous and asynchronous operation on the same
wire set
- Supports a maximum of 127 physical devices
- Guaranteed bandwidth and short delay time suitable for telephone,
audio and similar applications
- Error handling and fault handling mechanisms are included in the
protocol
Note!
Computer systems may not comply with FCC class B requirements if
a non-approved cable is connected to the USB port, even if no device
is connected to the cable or only a low-speed device is connected.
Always use a cable that meets the requirements of the highest speed
devices.
Содержание PC-686BX(NLX)-LV
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