GXM Datasheet, PDF (37/244 Pages) National Semiconductor (TI) – Geode™ GXm Processor Integrated x86 Solution with MMX Support

Signal Definitions (Continued)
1
A
3.3V Plane
(VCC3)
37
A
3.3V Plane
(VCC3)
2.9V Plane
(VCC2)
Geode™ GXm
Processor
320 SPGA - Top View
2.9V Plane
(VCC2)
3.3V Plane
(VCC3)
AN
1
To 2.9V
Regulator
Legend
= High frequency capacitor
= 220 µF, low ESR capacitor
= 3.3V connection
= 2.9V connection
3.3V Plane
(VCC3)
AN
37
Note: Where signals cross plane splits, it is recommended to include AC
decoupling between planes with 47pF capacitors.
Figure 2-7. SPGA Recommended Split Power Plane and Decoupling
Revision 3.1
37
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