82830MP Datasheet, PDF (16/159 Pages) Intel Corporation – Intel 830MP Chipset: 82830MP Graphics and Memory Controller Hub (GMCH-M)

Intel® 830MP Chipset
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System Architecture
The 82830MP Graphics Memory Controller Hub (GMCH-M) is a highly integrated hub that provides
the CPU interface (optimized for the mobile Intel^® Pentium^® III Processor-M processor), the SDRAM
system memory interface, a hub link interface to the 82801CAM I/O Controller Hub (ICH3-M), and is
optimized for mobile Intel Pentium III Processor-M configurations at 133-MHz PSB.
• 1.25V AGTL host bus supporting 32-bit host addressing
• System SDRAM supports PC133 (LVTTL) SDRAM
• Supports 1.0 GB of system SDR
• AGP interface with 1x/2x/4x SBA/Data Transfer and 2x/4x Fast Write capability
• Hub interface to ICH3-M
Host Interface
The 830MP chipset GMCH-M is optimized for the Intel Pentium III Processor-M. The GMCH-M
supports a PSB frequency of 133 MHz using 1.25V AGTL signaling. Single ended/dual ended
termination AGTL is supported for single processor configurations. It supports 32-bit host addressing,
decoding up to 4 GB of the CPU’s memory address space. Host initiated I/O cycles are decoded to
AGP/PCI1, Hub interface, or GMCH-M configuration space. Host initiated memory cycles are decoded
to AGP/PCI1, Hub interface, or system SDRAM. All memory accesses from the Host interface that hit
the graphics aperture are translated using an AGP address translation table. AGP/PCI1 device accesses
to non-cacheable system memory are not snooped on the host bus. Memory accesses initiated from
AGP/PCI1 using PCI semantics and from Hub interface to system SDRAM will be snooped on the host
bus.
System Memory Interface
The Intel 830MP chipset GMCH-M integrates a system memory SDRAM controller with a 64-bit wide
interface. The GMCH-M supports Single Data Rate (SDR) SDRAM for system memory.
Consequently, the Intel 830MP chipset’s system memory buffers support LVTTL signal interfaces.
Configured for Single Data Rate SDRAM, the Intel 830MPchipset’s memory interface includes support
for the following:
• Up to 1.0 GB of 133-MHz SDR SDRAM using 512-Mb technology
• PC133 SO-DIMMs
• Maximum of two SO-DIMMs, single-sided and/or double-sided
• The Intel 830MP chipset only supports four bank memory technologies.
• Four Integrated Clock buffers
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Datasheet
298338-001