4.8.6 SMRAM .........................................................................................4-36
5
Pinout and Package Information................................................................................5-1
5.1
5.2
82443BX Pinout............................................................................................5-1
Package Dimensions....................................................................................5-8
Figures
1-1
3-1
3-2
4-1
4-2
4-3
4-4
4-5
4-6
4-7
Intel® 440BX AGPset System Block Diagram .............................................1-2
82443BX PCI Bus Hierarchy ........................................................................3-5
SDRAM DIMMs and Corresponding DRB Registers..................................3-23
Memory System Address Space ..................................................................4-2
Four-DIMM Configuration with FET switches .............................................4-16
Three-DIMM SDRAM Configuration ...........................................................4-17
Three-SODIMMs EDO Configuration .........................................................4-18
Three-SODIMMs SDRAM Configuration ....................................................4-19
Typical Intel® 440BX AGPset System Clocking..........................................4-28
Reset CPURST# in a Desktop or Mobile System When
PCIRST# Asserted .....................................................................................4-33
External Glue Logic Drives CPU Clock Ratio Straps..................................4-34
82443BX Pinout (Top View–left side)...........................................................5-2
82443BX Pinout (Top View–right side).........................................................5-3
82443BX BGA Package Dimensions—Top and Side Views ........................5-8
82443BX BGA Package Dimensions—Bottom Views ..................................5-9
4-8
5-1
5-2
5-3
5-4
viii
82443BX Host Bridge Datasheet
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