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Desktop Board Features
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Intel
®
82845G Graphics Memory Controller Hub (GMCH)
The GMCH provides the processor, system memory, AGP, and hub interfaces in the
Intel 845 chipset platform. Features on Desktop Boards D845GRG and D845GBV include:
• Single processor support with 533 MHz or 400 MHz data transfer rates
• Support for up to 2 GB (with 512 Mbit technology) DDR-SDRAM at 266/200 MHz operation
✏
NOTE
512 Mbit technology has not been validated on these boards
• 1.5 V AGP interface with 4X Side Band Addressing (SBA)/data transfer and 2X and 4X
fast write
Intel
®
82801DB I/O Controller Hub (ICH4)
The ICH4 integrates many I/O functions and provides the I/O subsystem with access to the rest of
the platform. ICH4 features on Desktop Boards D845GRG and D845GBV include:
• Integrated IDE controller supports two Ultra DMA-33 and ATA-66/100 channels, and PIO
modes
• SMBus interface
• FWH interface
• Low Pin Count (LPC) interface
• AC ’97 2.1 compliant link for audio and telephony codecs
• Integrated Intel
82562ET 10/100 Mbit/sec Platform LAN Connect (PLC) device for interfacing
the ICH4 LAN connect interface to LAN connect component
• Three UHCI and one EHCI compliant host controllers with support for up to six USB ports
Firmware Hub (FWH)
The 4 Mbit Firmware Hub has these features:
• System BIOS
• System security and management logic
Input/Output (I/O) Controller
The SMSC LPC47M172 or National Semiconductor PC87372 super I/O controllers feature the
following:
• Low pin count (LPC) interface
• Two serial ports (one via a board connector)
• One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port
(EPP) support
• Serial IRQ interface compatible with serialized IRQ support for PCI systems
• PS/2-style mouse and keyboard interfaces
• Interface for one 1.2 MB, 1.44 MB, or 2.88 MB diskette drive
• Intelligent power management, including a programmable wake up event interface
• PCI power management support
• Two fan tachometer inputs