Intel Pentium III Mobile module family

Pentium III mobile modules integrate mobile CPU, 82443BX Host bridge controller and voltage regulator on the same board. 42443BX controller (part of 440BX AGPset) includes DRAM controller, bus controller and PCI bus controller. Voltage regulator on the module is used to convert 12 Volt external voltage into lower voltage for the 82443BX chips and CPU. To interface with the main board the module uses Mobile Module Connector 2 (MMC-2) - 400-pin connector that was also used for Celeron and Pentium II mobile modules. CPUs on the mobile modules have the same features as mobile Pentium III microprocessors. The CPUs are manufactured using 0.18 micron technology and have 16 KB code and 16 KB data level 1 caches, on-die 256 KB level 2 cache and 100 MHz Front Side Bus frequency. Many module processors incorporate SpeedStep feature. Also, mobile processors include two low-power states that are not present in desktop microprocessors:

• Quick Start state has very low exit latency (10 bus cycles) and lower power consumption than Auto Halt state.
• Deep Sleep state offers the best power-savings, but exit time from this state is higher than for any other low-power state.

Like the mobile Pentium II processors in microPGA2 and BGA2 packages, the processors in mobile modules include Stop Grant and Sleep low-power modes, but these modes are not supported by modules.

Part numbers of mobile modules are different from part numbers of Intel microprocessors. Module names usually starts from "PM". The third letter in the part number tells the type of the CPU: "L" for mobile Pentium III, and "M" for mobile Pentium III with SpeedStep technology. Next three digits are processors speed in Megahertz, and the following two digits signify processor level 2 cache size. Remaining digits and letters in the part number identify module's design revision and processor revision.