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Intel
®
945GME Express Chipset—Theory of Operation
Intel
®
Core
TM
2 Duo processor with the Mobile Intel
®
945GME Express Chipset
Manual May 2007
24 Order Number: 317443-001US
3.4.1.1 System Memory
The evaluation board supports DDR2 400/533/667 main memory. Two 200-pin
SODIMM connectors (one per channel) on the board support unbuffered, non-ECC,
single and double-sided DDR2 400/533/667 MHz SODIMMs. These SODIMMs provide
the ability to use up to 1 Gbit technology for a maximum of 4 GBytes system memory.
Note: Memory that utilizes 128 MBit technology is not supported on the Intel
®
945GME
Express Chipset.
Note: The SODIMM connectors are on the back side of the board.
Caution: Standby voltage is applied to the SODIMM sockets when the system is in the S3 state.
Therefore, do not insert or remove SODIMMs unless the system is unplugged.
3.4.1.2 DMI
The Intel
®
945GME Express Chipset GMCH’s Direct Media Interface (DMI) provides
high-speed bi-directional chip-to-chip interconnect for communication with the ICH7-M.
3.4.1.3 Advanced Graphics and Display Interface
The reference board has five options for displaying video, VGA, LVDS, TVOUT, SDVO, or
PCI Express* Graphics. SDVO (MEC) and PCI Express* Graphics are multiplexed on the
same pins within the Intel
®
945GME Express Chipset. The Intel
®
945GME Express
Chipset contains one SDVO/PCI Express* Graphics Slot (J6C1) for a PCI Express*
compatible graphics card or an SDVO compatible graphics card, one LVDS connector
(J5F1), one TVOUT connector (J2A1), and one 15-pin VGA connector (J2A2B).
3.4.2 ICH7-M
The ICH7-M is a highly integrated multifunctional I/O controller hub that provides the
interface to the system peripherals and integrates many of the functions needed in
today’s PC platforms. The following sections describe the reference board
implementation of the ICH7-M features, which are listed below:
• Two PCI Express* (x1) connectors
•Two PCI connectors
•LPC interface
• System management
•ACPI* 2.0 compliant
•Real Time Clock
•652 mBGA package
•Two SATA drive connectors
• One IDE connector
• Eight Universal Serial Bus (USB) 2.0 ports (five ports provided on rear-panel, three
provided via headers (J6H2, J7E2)
3.4.2.1 PCI Express* Slots
The reference board has two x1 PCI Express* slots for add-in cards. The PCI Express*
interface is compliant to the PCI Express* Rev. 1.0a Specification.