January 2007
217
Intel
®
855GME Chipset and Intel
®
6300ESB ICH Embedded Platform Design Guide
Intel
®
6300ESB Design Guidelines
Placing the capacitance near the USB connectors for cables that share power and ground
conductors is required to ensure the system passes droop requirements. Cables that provide
individual power and ground conductors for each port may usually meet droop requirements by
providing adequate capacitance near the motherboard mating connector, since droop is actually an
effect felt by adjacent ports due to switching transients on the aggressor port. In the separate
conductor case, all transients will be seen/dampened by the capacitance at the motherboard mating
connector before they may cause problems with the adjacent port sharing the same cable. See
sections 7.2.2 and 7.2.4.1 of the Universal Serial Bus Specification, Revision 2.0, for more details.
Note:
Cables that contain more than two signal pairs are not recommended due to unpredictable
impedance characteristics.
9.6.6.2
Motherboard/PCB Mating Connector
Proper selection of a motherboard mating connector for front panel USB support is important to
ensure signal quality is not adversely affected due to a poor connector interface. The cable and
PCB mating connector must also pass the TDR requirements listed in the Universal Serial Bus
Specification, Revision 2.0
.
9.6.6.2.1
Pin-Out
A ten pin, 0.1-inch pitch stake pin assembly is recommended with the pin-out listed in
and schematic shown in
.
Table 87.
Front Panel Header Pin-Out
Pin
Description
1
Vcc
2
Vcc
3
dm1
4
dm2
5
dp1
6
dp2
7
GND
8
GND
9
key
10
no connect or over-current sense
Содержание 6300ESB ICH
Страница 24: ...24 Intel 855GME Chipset and Intel 6300ESB ICH Embedded Platform Design Guide Introduction...
Страница 36: ...36 Intel 855GME Chipset and Intel 6300ESB ICH Embedded Platform Design Guide General Design Considerations...
Страница 102: ...102 Intel 855GME Chipset and Intel 6300ESB ICH Embedded Platform Design Guide...
Страница 122: ...122 Intel 855GME Chipset and Intel 6300ESB ICH Embedded Platform Design Guide...
Страница 152: ...152 Intel 855GME Chipset and Intel 6300ESB ICH Embedded Platform Design Guide System Memory Design Guidelines DDR SDRAM...
Страница 172: ...172 Intel 855GME Chipset and Intel 6300ESB ICH Embedded Platform Design Guide Integrated Graphics Display Port...
Страница 190: ...190 Intel 855GME Chipset and Intel 6300ESB ICH Embedded Platform Design Guide Hub Interface...
Страница 246: ...246 Intel 855GME Chipset and Intel 6300ESB ICH Embedded Platform Design Guide Intel 6300ESB Design Guidelines...
Страница 264: ...264 Intel 855GME Chipset and Intel 6300ESB ICH Embedded Platform Design Guide Platform Clock Routing Guidelines...
Страница 298: ...298 Intel 855GME Chipset and Intel 6300ESB ICH Embedded Platform Design Guide Schematic Checklist Summary...
Страница 318: ...318 Intel 855GME Chipset and Intel 6300ESB ICH Embedded Platform Design Guide Layout Checklist...