28 Mobile Intel
®
945GM Express Chipset
Development Kit User’s Manual
Theory of Operation
• 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.
3.4.2.2 PCI Slots
The reference board has two PCI slots for add-in cards. The PCI bus is compliant to the PCI Rev.
2.3 Specification at 33 MHz.
3.4.2.3 On-Board LAN
The 82573E provides the LAN connectivity for this platform. It provides Gigabit ethernet as well
as Intel® Active Management Technology functions. It is connected to the ICH7-M through a PCIe
interface and to an RJ45 connector at J5A1A with built in magnetic decoupling. Access to this
interface is provided on the rear I/O panel (See Figure 3 on page 42).
Features of the 82573E are as follows:
• x1 PCIe Interface
• 2 Gbps peak bandwidth per direction
• Wide, pipelined internal data path architecture
• 32 KB configurable Receive (Rx) and Transmit (Tx) FIFO
• IEEE 802.3x compliant flow control support with software controllable pause times and
threshold values
• Programmable host memory Rx buffers (256 B- 16 KB)
• Descriptor ring management hardware for Tx and Rx
• Tx/Rx IP, TCP, and UDP checksum offloading
• Tx TCP Segmentation
• IPv6 offloading
• IEEE 802.1g virtual LAN support
• Intel® Active Management Technology
• Wake on LAN (WoL) support
Note: The 82573E is only powered in S3-S0 and will not support AMT or WoL support from S4 or S5.
• SPI or EEPROM support
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