Design Checklist

Table 3-1. Slot Connectivity (Sheet 3 of 3)

Processor Pin

Pin Connection

 

 

TDO

UP: Connected to ITP. 150 ohm pull-up to 2.5V.

DP: Connected to jumpers between ITP and CPU signals. See DP schematics for details.

 

 

 

TDI

UP: Connected to ITP. 150 ohm - 330 ohm pull-up to 2.5V.

DP: Connected to jumpers between ITP and CPU signals. See DP schematics for details.

 

 

 

TESTHI

UP: 4.7K ohm pull-up to 2.5V. DP: Connect CPUs and 4.7K ohm pull-up to 2.5V.

 

 

THERMTRIP#

UP: NC if not used. 220 ohm pull-up to 2.5V if used. DP: Connect CPUs and 220 ohm

pull-up to 2.5V.

 

 

 

TMS

UP: 1K ohm pull-up to 2.5V. 47 ohm series resistor to ITP. DP: Separate 47 ohm series

resistors then hooked together to ITP. 1K ohm pull-up to 2.5V.

 

 

 

TRDY#

UP: Connect to 82443GX. DP: Connect CPUs and 82443GX.

 

 

TRST#

UP: Connect to ITP. 680 ohm pull-down. DP: Connect CPUs and 680 ohm pull-down.

 

 

VID[4:0]

8.2K ohm pull-up to 5V is the default for VRM use. Optional override could be used. Also

connect to optional LM79.

 

 

 

Table 3-2. GND & Power Pin Definition

 

GND

VccCORE

Vtt (1.5V)

VCC3 (3.3V)

Reserved (NC)

Vcc (5V)

A2

 

A62

B13

B89

A1

B113

A16

B109

 

 

 

 

 

 

 

 

 

A6

 

A66

B17

B93

A3

B117

A47

 

 

 

 

 

 

 

 

 

 

A10

 

A70

B25

B97

B5

B121

A88

 

 

 

 

 

 

 

 

 

 

A14

 

A74

B29

B105

B9

 

A113

 

 

 

 

 

 

 

 

 

 

A18

 

A78

B33

 

 

 

A116

 

 

 

 

 

 

 

 

 

 

A22

 

A82

B37

 

 

 

B12

 

 

 

 

 

 

 

 

 

 

A26

 

A86

B45

 

 

 

B20

 

 

 

 

 

 

 

 

 

 

A30

 

A90

B49

 

 

 

B112

 

 

 

 

 

 

 

 

 

 

A34

 

A94

B53

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A38

 

A98

B57

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A42

 

A102

B65

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A46

 

A106

B69

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A50

 

A110

B73

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A54

 

A114

B77

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A58

 

A118

B85

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Intel®440GX AGPset Design Guide

3-4

Page 64
Image 64
Intel 440GX manual Slot Connectivity Sheet 3, GND & Power Pin Definition, Vtt VCC3 Reserved NC Vcc

440GX specifications

The Intel 440GX chipset was launched in 1997 as part of Intel's series of chipsets known as the 440 family, and it served as a critical component for various Pentium II and Pentium III-based motherboard architectures. Specifically designed for the second generation of Intel’s processors, the 440GX delivered enhanced performance and supported a range of important technologies that defined PC architectures of its time.

One of the main features of the Intel 440GX was its support for a 100 MHz front-side bus (FSB), which significantly improved data transfer rates between the CPU and the memory subsystem. This advancement allowed the 440GX to accommodate both the original Pentium II processors as well as the later Pentium III chips, providing compatibility and flexibility for system builders and consumers alike.

The 440GX chipset included an integrated AGP (Accelerated Graphics Port) controller, which supported AGP 2x speeds. This enabled high-performance graphics cards to be utilized effectively, delivering many enhanced graphics capabilities for gaming and multimedia applications. The AGP interface was crucial at the time as it offered a dedicated pathway for graphics data, increasing bandwidth compared to traditional PCI slots.

In terms of memory support, the 440GX could address up to 512 MB of SDRAM, allowing systems built with this chipset to run comfortably with sufficient memory for the era’s demanding applications. The memory controller was capable of supporting both single and double-sided DIMMs, which provided versatility in memory configuration for system builders.

Another notable feature of the Intel 440GX was its support for multi-processor configurations through its Dual Processors support feature. This allowed enterprise and workstation computers to leverage the performance advantages of multiple CPUs, making the chipset suitable for business and professional environments where multitasking and high-performance computing were essential.

On the connectivity front, the chipset supported up to six PCI slots, enhancing peripheral device integration and expansion capabilities. It also included integrated IDE controllers, facilitating connections for hard drives and CD-ROM devices.

Overall, the Intel 440GX chipset represented a balanced combination of performance, flexibility, and technology advancements for its time. Its introduction helped establish a foundation for subsequent advancements in PC technology and set the stage for more powerful computing systems in the years to come.