Mobile Intel® 915GME Express Chipset
April 2007 Development Kit User’s Manual
Order Number: 317230-001US 23
Theory of Operation—Mobile Intel® 915GME Express Chipset
Note: Memory that utilizes 128 MBit technology is not supported by the GMCH and is not
supported on the Mobile Intel® 915GME 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 Mobile Intel® 915GME Express Chipset GMCH’s Direct Media Interface (DMI)
provides high-speed bi-directional chip-to-chip interconnect for communication with
the ICH6-M.

3.4.1.3 Advanced Graphics and Display Interface

The reference board has five options for displaying video, VGA, LVDS, SDVO, or PCI
Express Graphics. SDVO (ADD2-R) and PCI Express Graphics are multiplexed on the
same pins within the Mobile Intel® 915GME Express Chipset . The Mobile Intel®
915GME 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) and one 15-pin VGA connector (J2A1B).
3.4.2 ICH6-M
The ICH6-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 ICH6-M features, which are listed below:
• Two PCI Express (x1) connectors
• Two PCI connectors
•LPC interface
•Wake-On-LAN support
• System management
• ACPI* 2.0 compliant
• Real Time Clock
• 609 mBGA package
• Two SATA drive connectors
• One IDE connector
• Eight Universal Serial Bus (USB) 2.0 ports (five ports provided on rear-panel, two
provided via front-panel header (J6H2) and one at the PCI Express docking
connector.)
• Integrated 10/100 MAC

3.4.2.1 PCI Express Slots

The reference board has two PCI Express slots for add-in cards. The PCI Express
interface is compliant to the PCI Express Rev. 01a Specification.

3.4.2.2 PCI Slots

The reference board has two x1 PCI slots for add-in cards. The PCI bus is compliant to
the PCI Rev. 2.3 Specification at 33 MHz.