STPCI01 STMicroelectronics, STPCI01 Datasheet - Page 68

• Manufacturer Part Number: STPCI01
• Description: STPC INDUSTRIAL - PC COMPATIBLE EMBEDED MICROPROC
• Manufacturer: STMicroelectronics

BOARD LAYOUT
6.2. HIGH SPEED SIGNALS
As some STPC interfaces (listed below in
decreasing speed order) run at high speeds, they
must be carefully routed or even shielded.
1) Memory interface.
2) Graphics and video interfaces.
3) PCI bus.
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This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
ground pad
Figure 6-5. Shielding Signals
Issue 2.4 - February 11, 2002
4) 14 MHz oscillator stage.
All clock signals must be routed first and shielded
for speeds of 27 MHz or higher. All high-speed
signals, such as memory control signals and PCI
control signals, require the same constraints.
All analog noise-sensitive signals should be
routed in a separate area and hence can be
routed indepedently.
ground pad
ground ring
shielded signal line
shielded signal lines