82845MP Datasheet, PDF (125/157 Pages) Intel Corporation – Intel 845 Family Chipset-Mobile 82845MP/82845MZ Chipset Memory Controller Hub Mobile (MCH-M)

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Intel^® 82845MP/82845MZ Chipset-Mobile (MCH-M)
5.4.5.
5.5.
5.6.
Intel SpeedStep^® Technology
Intel SpeedStep^® technology allows the system to operate in multiple performance states. Intel SpeedStep
technology offers two CPU/system operational modes:
Maximum Performance Mode: Maximum CPU Core Frequency.
Battery Optimized Mode: Reduced CPU core frequency to extend battery life.
Intel SpeedStep technology transitions states only when AC power is connected or disconnected. It
transitions by changing the CPU PLL multiplier, which can only be done in the Deep Sleep CPU state
(clock going to the CPU is stopped), which is the C3 CPU power state.
Most of the control for Intel SpeedStep technology is done in the ICH3-M. However, the MCH-M must
cooperate on certain functions.
MCH-M Clocking
The CK408 compliant clock synthesizer supports the Intel 845MP/845MZ Chipset. For details refer to
the Intel^® Pentium^® 4 Processor in the 478 Pin Package and Intel^®845MP/845MZ Chipset Platform
Design Guide.
MCH-M System Reset and Power Sequencing
Please refer to the Intel^® Pentium^® 4 Processor in the 478 Pin Package and Intel^® 845MP/845MZ
Chipset Platform Design Guide for details.
250687-002
Datasheet
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