Intel ® 82815E Graphics And Memory Controller Hub (Gmch); Intel ® 82801Ba I/O Controller Hub (Ich2) - Intel D815EEA Technical Product Specification

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1.6.1 Intel 82815E Graphics and Memory Controller Hub (GMCH)
The GMCH provides the following:
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An integrated Synchronous DRAM memory controller with autodetection of SDRAM
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An interface for a single AGP device or a Graphics Performance Accelerator (GPA) card
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An interface for a digital video output (DVO) connector for a flat panel, digital CRT, or
TV-out
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Support for ACPI Rev 1.0 and APM Rev 1.2 compliant power management
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1.6.2 Intel 82801BA I/O Controller Hub (ICH2)
The ICH2 provides the following:
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33 MHz PCI bus interface
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Support for up to six PCI master devices
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Low Pin Count (LPC) interface that supports an LPC-compatible I/O controller
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Support for two Master/DMA devices
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Integrated IDE controller that supports Ultra DMA (33 MB/sec) and ATA-66/100 mode
(66 MB/sec, 100 MB/sec)
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Integrated LAN Media Access Controller
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Universal Serial Bus interface with two USB controllers providing four ports in a
UHCI Implementation
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Power management logic for ACPI Rev 1.0b compliance
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System Management Bus (SMBus clock and data lines also routed to PCI bus connector 2)
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Real-Time Clock with 256-byte battery-backed CMOS RAM
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AC'97 digital link for Audio and telephony codecs, including:
 AC'97 2.1 compliance
 Logic for PCM in, PCM out, Mic input, Modem in, and Modem out
 Separate PCI functions for audio and modem
 Communications Network Riser (CNR) interface
1.6.2.1 IDE Interfaces
The ICH2's IDE controller has two independent bus-mastering IDE interfaces that can be
independently enabled. The IDE interfaces support the following modes:
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Programmed I/O (PIO): CPU controls data transfer
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8237-style DMA: DMA offloads the CPU, supporting transfer rates of up to 16 MB/sec
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Ultra DMA: DMA protocol on IDE bus supporting host and target throttling and transfer rates
of up to 33 MB/sec.
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Ultra ATA-66: DMA protocol on IDE bus supporting host and target throttling and transfer
rates of up to 66 MB/sec. ATA-66 protocol is similar to ATA-33 and is device driver
compatible. ATA-66 uses faster timings and requires a specialized cable to reduce reflections,
noise, and inductive coupling.
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Ultra ATA-100: DMA protocol on IDE bus allows host and target throttling. The ICH2 Ultra
ATA-100 logic can achieve read transfer rates up to 100 MB/sec and write transfer rates up to
88 MB/sec. The higher quality cable used for ATA-66 DMA support is adequate to reduce
reflections, noise, and inductive coupling for ATA-100 operation.
Product Description
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