Design Checklist

Table 3-4. 82443GX Connectivity (Sheet 2 of 3)

SIGNAL

CONNECTION

 

 

GADSTBA,

 

GADSTBB,

 

GDEVSEL#,

8.2K ohm pull-ups to 3.3V. Connected to AGP connector.

GFRAME#, GGNT#,

 

GIRDY#, GREQ#,

 

GSTOP#, GTRDY#,

 

 

 

GPAR

100K ohm pull-down required. Connect to AGP connector.

 

 

GTLREFA, GTLREFB

GTL buffer voltage reference input (1.0V = 2/3 vtt)

 

 

HA[31:3]#

Connected to CPUs.

 

 

HCLKIN

Connected to CK100 through 22 ohm series resistor.

 

 

HD[63:0]#

Connected to the CPUs.

 

 

HIT#, HITM#

Connected to CPUs.

 

 

HLOCK#

Connected to CPUs.

 

 

HREQ[4:0]#

Connected to CPUs.

 

 

HTRDY#

Connected to CPUs.

 

 

IRDY#

2.7K ohm pull-up to 5V. Connected to PCI bus.

 

 

MAA[14:0]

Connected to DIMM0 and DIMM1.

 

 

MAB[14, 13, 10],

Connected to DIMM2 and DIMM3.

MAB[11, 9:0]#

 

 

 

MD[63:0], MECC[7:0]

Connected to each DIMM. FET Switch Design: Connected to FET switches.

 

 

PAR

Connected to PCI bus.

 

 

PCIRST#

Connected to PIIX4E, AGP connector, and PCI connectors.

 

 

PCLKIN

Connected to CK100 through 22 ohm series resistor.

 

 

PGNT[4:0]#

8.2K ohm pull-ups to 3.3V. Connected to PCI connectors.

 

 

PHLDA#

8.2K ohm pull-up to 3.3V. Connected to PIIX4E.

 

 

PHOLD#

8.2K ohm pull-up to 3.3V. Connected to PIIX4E.

 

 

PIPE#

8.2K ohm pull-ups to 3.3V. Connected to AGP connector.

 

 

PLOCK#

2.7K ohm pull-up to 5V. Connected to PCI connectors.

 

 

PREQ[4:0]#

2.7K ohm pull-ups to 5V. Connected to PCI connectors (except PREQ4#).

 

 

RBF#

8.2K ohm pull-up to 3.3V. Connected to AGP connector.

 

 

REFVCC5

PCI 5V reference voltage for 5V tolerant buffers.

 

 

RS[2:0]#

Connected to CPUs.

 

 

SBA[7:0]

Connected to AGP connector.

 

 

SBSTB

8.2K ohm pull-up to 3.3V. Connected to AGP connector.

 

 

SCAS[B:A]#

Each connected to up to 2 DIMMs.

 

 

SERR#

2.7K ohm pull-up to 5V. Connected to PCI bus.

 

 

SRAS[B:A]#

Each connected to up to 2 DIMMs.

 

 

ST[2:0]

Connected to AGP connector.

 

 

STOP#

2.7K ohm pull-up to 5V. Connected to PCI bus.

 

 

SUSTAT#

10K ohm pull-up to 3.3V. Connect to PIIX4E for POS implementation.

 

 

TESTIN#

8.2K ohm pull-up to 3.3V which may be removed if validation permits.

 

 

Intel®440GX AGPset Design Guide

3-11

Page 70 Page 72
Page 71
Image 71
Intel 440GX manual GX Connectivity Sheet 2
Page 70 Page 72

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.
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