Specifications

Ref# 420826 Intel
®
Atom™ processor CE4100 71
Platform Design Guide
Intel Confidential
The passive configuration has not been validated, but is documented here as a possible
cost-saving solution with the following caveats:
• This configuration also requires a 75 Ω termination in the TVs that require a standard 75
Ω video cable for connecting to the TV.
• There is a possibility of damage to the chip when the power supply’s connection to
ground is removed, because of transients on the connecter/cable (due to the removal of
the isolation buffer/amplifier).
• Place the 75Ω Termination Resistor before the 75Ω trace.
• Minimize the route length after the termination resistor. Max length = 0.5 ”
Caution!
Removing the buffer/amplifier can result in damage to the processor when the power
supply’s connection to ground is removed, because of transients on the
connecter/cable.
6.1.1.3 VBG_EXTR_VDAC Connection
This signal is extremely sensitive.
• The package ball should connect to a 1.1KΩ + 60.4Ω precision resistor as close as
possible to the processor and should be as short as possible to prevent noise coupling
and to reduce IP drop.
• Shield route on board with VSSA_VDAC on each side and on top & bottom if possible.
Keep any toggling signal route on the board at least 4 mil away from VBG_EXTR_VDAC
package route if possible.
• Shield VSSA_VDAC route width should be 3x the thickness of the dielectric thickness.
• The VBG_EXTR_VDAC route should be shielded with VSSA_VDAC on the board. The
termination resistor on the board should be surrounded with a ground floor or shield
routes.
Figure 6-3. VBG_EXTR_VDAC Resistor Design
VBG_EXTR_VDAC
60.4Ω +/- 1%1.1KΩ +/- 1%