VT8235 datasheet(6/145 Pages) VIA

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VT8235 V-Link South Bridge

Revision 1.22 October 24, 2002

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Table Of Contents

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LIST OF FIGURES

FIGURE 1. PC SYSTEM CONFIGURATION USING THE VT8235......................................................................................... 5

FIGURE 2. VT8235 BALL DIAGRAM (TOP VIEW) .................................................................................................................. 6

FIGURE 3. POWER MANAGEMENT SUBSYSTEM BLOCK DIAGRAM ......................................................................... 132

FIGURE 4. SYSTEM BLOCK DIAGRAM USING THE VT8754 NORTH BRIDGE .......................................................... 134

FIGURE 5. MECHANICAL SPECIFICATIONS – 487 PIN BALL GRID ARRAY PACKAGE ........................................ 139

LIST OF TABLES

TABLE 1. VT8235 PIN LIST (NUMERICAL ORDER)

.................................................................................................................................. 7

TABLE 2. VT8235 PIN LIST (ALPHABETICAL ORDER)

............................................................................................................................ 8

TABLE 3. PIN DESCRIPTIONS..................................................................................................................................................... 9

TABLE 4. MEMORY MAPPED REGISTERS............................................................................................................................ 21

TABLE 5. FUNCTION SUMMARY............................................................................................................................................. 21

TABLE 6. SYSTEM I/O MAP ....................................................................................................................................................... 21

TABLE 7. REGISTERS ................................................................................................................................................................. 22

TABLE 8. KEYBOARD CONTROLLER COMMAND CODES .............................................................................................. 38

TABLE 9. CMOS REGISTER SUMMARY................................................................................................................................. 41

TABLE 10. APIC FIXED IRQ ROUTING................................................................................................................................... 64

TABLE 11. PNP IRQ ROUTING TABLE.................................................................................................................................... 66

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