IEI Integration ICE-DB-9S - Manual (Page 67)

ICE Module
Page 54
4.5 Universal Serial Bus (USB)
The Universal Serial Bus (USB) provides a bi-directional, isochronous, hot-attachable
Plug and Play serial interface for adding external peripheral devices such as game
controllers, communication devices and input devices on a single bus. A COM
Express Module must provide a minimum of four USB ports and can support up to
eight USB ports.
USB stands for Universal Serial Bus, an industry-standard specification for attaching
peripherals to a computer. It delivers high performance, the ability to plug in and
unplug devices while the computer is running, great expandability, and a wide variety
of solutions.
The USB physical topology consists of connecting the downstream hub port to the
upstream port of another hub or to a device. The USB can operate at three speeds.
High-speed (480 Mb/s) and full-speed (12 Mb/s) require the use of a shielded cable
with two power conductors and twisted pair signal conductors. Low-speed (1.5 Mb/s)
recommends, but does not require the use of a cable with twisted pair signal
conductors. The connectors are designed to be hot plugged. The USB Icon on the
plugs provides tactile feedback making it easy to obtain proper orientation.
4.5.1 Signal Description
Table 4-13 shows COM Express USB signals, including pin number, signals, I/0,
power plane, terminal resistors, damping resistors and descriptions.
Table 4-13: USB Signal Description
Pin Signal I/O Description
A46
A45 USB0+
USB0- I/O USB Differential Data Port 0.
B46
B45 USB1+
USB1- I/O USB Differential Data Port 1.
A43
A42 USB2+
USB2- I/O USB Differential Data Port 2.
B43
B42 USB3+
USB3- I/O USB Differential Data Port 3.
A40
A39 USB4+
USB4- I/O USB Differential Data Port 4.
B40
B39 USB5+
USB5- I/O USB Differential Data Port 5.
A37
A36 USB6+
USB6- I/O USB Differential Data Port 6.