Intel ECB-865 user manual 1 82815 Gmch and 82801BA

ECB-865

2.3.182815 GMCH and 82801BA

The Intel® 815 chipset for use with the universal socket 370 is a high-flexibility chipset designed to extend from the basic graphics/multimedia PC platform up to the mainstream performance desktop platform. The chipset consists of the Intel_ 82815 Graphics and Memory Controller Hub (GMCH) and an I/O Controller Hub (ICH or ICH2) for the I/O subsystem. The GMCH integrates a system memory SDRAM controller that supports a 64-bit 100/133 MHz SDRAM array.

The Intel 82815 GMCH integrates a Display Cache SDRAM controller that supports a 32- bit 133 MHz SDRAM array for enhanced integrated 2D and 3D graphics performance. Multiplexed with the display cache interface is an AGP controller interface to enable graphics configuration and upgrade flexibility with the Intel 815 chipset for use with the universal socket 370. The AGP interface and the internal graphics device are mutually exclusive. When the AGP port is populated with an AGP graphics card, the integrated graphics is disabled; thus, the display cache interface is not needed.

The Intel 815 chipset for use with the universal socket 370 supports the following processors:

Intel® Pentium® III processor based on 0.18 micron technology (CPUID = 068xh). These processors support the AGTL+ bus interface

Intel® Celeron™ processor based on 0.18 micron technology (CPUID = 068xh). This applies to Celeron 533A MHz and ≥ 566 MHz processors. These processors support

the AGTL+ bus interface.

Future 0.13 micron socket 370 processors. These processors support the AGTL bus interface.

The 82815 GMCH along with the 82801BA ICH2 provide the basic functionality and buses of the system:

Interface to SDRAM, system memory bus. system memory bus.

64-bit data bus. Up to 3 double sided DIMMs at 100 MHz Up to 2 double sided or 3 single sided DIMMs at 133 MHz

PCI Rev 2.2 compliant with support for 33 MHz PCI operations, Supports up to 6 Req/Gnt pairs

System Management Bus (SMBus) compatible with most I2C devices

Integrated IDE controller support Ultra ATA/100/66/33 with two 40-pin connectors

2 USB ports integrated in ICH2.

Integrated LAN controller

AC.97 2.1 compliant link for audio and telephony codecs up to 6 channels

Low Pin Count (LPC) interface

Firmware Hub (FWH) interface support

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ECB-865 User’s Manual 7