Product specifications

Design Guide - VT82C694X Apollo Pro133 with VT82C686A

Preliminary Revision 0.5, November 19, 1999 26 Motherboard Design Guidelines

Technologies, Inc.

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(a) Component Layer (b) Ground Layer

Figure 2-19. VT82C686A Power and Ground Layout

Notes:

1. In Figure 2-19 (b) and (c), a black round dot represents a via with no connection to the specified layer and a white round dot

represents a via with a connection to the specified layer. For example, the white round dots in Figure 2-19 (b) are ground

connection vias and the white round dots in Figure 2-19 (c) are VCC3 connection vias.

2. The square-like rail in the center area of the VT82C686A chip on the component layer in Figure 2-19 (a) connects to ground.

The center square-like block representing an unused routing area connects to ground in Figure 2-19 (d).

3. Pin A1 of the VT82C686A chip is located at the upper-left corner.