參數(shù)資料
型號: STPCD0113BTC3
元件分類: 32位微控制器
英文描述: 32-Bit Microprocessor
中文描述: 32位微處理器
文件頁數(shù): 57/61頁
文件大?。?/td> 1007K
代理商: STPCD0113BTC3
BOARD LAYOUT
Issue 2.2 - October 13, 2000
57/61
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:
- Memory Interface.
- Graphics and video interfaces
- PCI bus
- 14MHz oscillator stage
All the clocks have to be routed first and shielded
for speeds of 27MHz or more. The high speed sig-
nals have the same contrainsts as some of the
memory interface 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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PDF描述
STPCI01 STPC INDUSTRIAL / PC COMPATIBLE EMBEDED MICROPROCESSOR
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