Design Checklist

3.782371EB (PIIX4E)

3.7.1PIIX4E Connections

Table 3-7. PIIX4E Connectivity (Sheet 1 of 4)

Signal Names

Connection

 

 

48MHz

Connect to CK100 through a 22 ohm series resistor.

 

 

A20GATE

Connected to SIO. 8.2K ohm pull-up to VCC3.

 

 

A20M#

Part of CPU/bus frequency circuit. 2.7K ohm pull-up to VCC3.

 

 

AD[31:0]

Connect to PCI slots and 82443GX.

 

 

AEN

Connect to SIO and ISA slots.

 

 

APICACK# / GPO12

UP: Leave as a NC. DP: Connect to IOAPIC.

 

 

APICCS# / GPO13

UP: Leave as a NC. DP: Connected to IOAPIC. 8.2K ohm pull-up to VCC3.

 

 

APICREQ# / GPO15

8.2K ohm pull-up to VCC3. DP: Connected to IOAPIC.

 

 

BALE

Connect to ISA slots.

 

 

BATLOW# / GPI9

8.2K ohm pull-up to 3VSB if BATLOW# is not used.

 

 

BIOSCS#

Connect to Flash.

 

 

C/BE#[3:0]

Connect to PCI slots and 82443GX.

 

 

CLOCKRUN#

100 ohm pull-down.

 

 

CONFIG1

8.2K ohm pull-up to 3VSB.

 

 

CONFIG2

8.2K ohm pull-down.

 

 

CPURST

Leave as a NC.

 

 

CPU_STP# / GPO17

No connect, or connected to CK100 with 10K ohm pull-up to 3VSB.

 

 

DACK#[7:0]

Connect to ISA slots. DACK#[3:0] also connect to SIO.

 

 

DEVSEL#

2.7K ohm pull-up to 5V or 10K ohm pull-up to 3V. Connect between 82443GX,

PCI slots, and PIIX4E.

 

 

 

DREQ[7:0]

Connected to ISA slots. 5.6K ohm pull-down.

 

 

EXTSMI#

Connected to LM79. 8.2K ohm pull-up to 3VSB.

 

 

FERR#

Connect between CPUs. 220 ohm pull-up to 2.5V.

 

 

FRAME#

2.7K ohm pull-up to 5V or 10K ohm pull-up to 3V. Connect between 82443GX,

PCI slots, and PIIX4E.

 

 

 

GNT[C:A]# / GPO[11:9]

No connect.

 

 

GPI1

Used as PCI_PME. 8.2K ohm pull-up to 3VSB. Pull-up to 3VSB is also required

when not using this pin.

 

 

 

GPI[x:y] (Unused)

2.7K ohm pull-up to VCC3.

 

 

GPO[x:y] (Unused)

No connect.

 

 

IDSEL

100 ohm resistor to AD18.

 

 

IGNNE#

Part of CPU/bus frequency circuit. 2.7K ohm pull-up to VCC3.

 

 

INIT#

Connected to CPUs. 330 ohm pull-up to 2.5V.

 

 

INTR

Part of CPU/bus frequency circuit. 2.7K ohm pull-up to VCC3.

DP: Connected to IOAPIC.

 

 

 

Intel®440GX AGPset Design Guide

3-16

Page 75 Page 77
Page 76
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Intel 440GX manual 82371EB PIIX4E, PIIX4E Connections, PIIX4E Connectivity Sheet 1, Signal Names Connection
Page 75 Page 77

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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