參數(shù)資料
型號： STPCCONSUMER-S
廠商： 意法半導(dǎo)體
英文描述： CONNECTOR ACCESSORY
中文描述： 連接器附件
文件頁數(shù)： 42/51頁
文件大?。?/td> 836K
代理商： STPCCONSUMER-S
BOARD LAYOUT
42/51
Release B
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
6.2 High speed signals
Some Interfaces of the STPC run at high speed
and have to be carefully routed or even shielded.
Here is the list of these interfaces, in decreasing
speed order:
1) Memory Interface.
2) Graphics and video interfaces
3) PCI bus
4) 14MHz oscillator stage
All the clocks haves to be routed first and shielded
for speeds of 27MHz ormore. The high speed sig-
nals follow the same contrainsts, like the memory
control signals and the PCI control signals.
The next interfaces to be routed are Memory, Vid-
eo/graphics, and PCI.
All the analog noise sensitive signals have to be
routed in a separate area and hence can be rout-
ed indepedently.
Figure 6-8. Shielding signals
ground ring
ground pad
shielded signal line
ground pad
shielded signal lines
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