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Chapter 3
Hardware
48
Reference Manual
LittleBoard 700
Utility 3 Interface (J18)
The Utility 3 interface is a 10-pin connector used to provide the two of the USB port signals to an
external board with USB connections or directly to the respective USB connector for the USB ports.
Table 3-19 gives the pin outs and interface signals for Utility 3 interface.
•
USB ports 2 (USB2) and 3 (USB3)
USB Signals (USB2 and USB3)
The LittleBoard 700 contains one root USB hub with four functional USB ports. This connector (Utility
3) provides two (USB2 and USB3) of the four USB ports. The hub is USB v.1.1 and Intel Universal
HCI v.1.1 compatible.
Features implemented for the USB ports include the following:
•
One root hub and two USB ports on this connector
•
USB v.1.1 and Intel Universal HCI v.1.1 compatible
•
Integrated physical layer transceivers
•
Over-current detection status on the USB port (software)
•
Over-current fuses for all four ports on the LB 700 board. See Table 2-3.
NOTE
Ampro does not recommend connecting a USB boot device to the
LittleBoard 700 through an external hub. Instead, connect the USB
boot device directly to the LittleBoard 700. Refer to Chapter 4, BIOS
Setup for more information.
Table 3-19. Utility 3 Interface Pin/Signal Descriptions (J18)
Pin #
Signal
I/O
Description
1
USB3PWR
-
+5V USB Port Power – Port is disabled if this input is low.
2
USB4PWR
-
+5V USB Port Power – Port is disabled if this input is low.
3
USBP3-
I/O
USB 3 Signal -
4
USBP4-
I/O
USB 4 Signal -
5
USBP3+
I/O
USB 3
6
USBP4+
I/O
USB 4
7
USB3GND
-
USB Port ground
8
USB4GND
-
USB Port ground
9
SHIELD3
-
USB Port shield (Cable Shield)
10
SHIELD4
-
USB Port shield (Cable Shield)
Notes:
The shaded area denotes power or ground.
Содержание Little Board 700
Страница 1: ...Little Board 700 Single Board Computer Reference Manual P N 5001670A Revision D...
Страница 6: ...Contents vi Reference Manual LittleBoard 700...
Страница 10: ...Chapter 1 About This Manual 4 Reference Manual LittleBoard 700...
Страница 26: ...Chapter 2 Product Overview 20 Reference Manual LittleBoard 700...
Страница 82: ...Chapter 4 BIOS Setup 76 Reference Manual LittleBoard 700...
Страница 84: ...Appendix A Technical Support 78 Reference Manual LittleBoard 700...
Страница 86: ...Appendix B Connector Part Numbers 80 Reference Manual LittleBoard 700...
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