Pentium
III Processor Mobile Module MMC-2
Featuring Intel
SpeedStep
Technology
243356-005
Datasheet
21
4.0
Functional Description
4.1
Pentium III Processor Mobile Module Featuring Intel
SpeedStep Technology
The Pentium
III
processor mobile module featuring Intel SpeedStep technology runs at speeds of
750/600 MHz, 700/550 MHz, 650/500 MHz, and 600/500 MHz, and offers a 100-MHz PSB.
4.2
L2 Cache
The on-die L2 cache has 256 KB, is eight-way set associative, and runs at the speed of the
processor core.
4.3
The 82443BX Host Bridge System Controller
Intel's 82443BX Host Bridge system controller is a highly integrated device that combines the bus
controller, the DRAM controller, and the PCI bus controller into one component. The 82443BX
Host Bridge has multiple power management features designed specifically for notebook systems
such as:
CLKRUN#, a feature that enables controlling of the PCI clock on or off.
The 82443BX Host Bridge suspend modes, which include Suspend-To-RAM (STR), Suspend-
To-Disk (STD), and Power-On-Suspend (POS).
System Management RAM (SMRAM) power management modes, which include Compatible
SMRAM (C_SMRAM) and Extended SMRAM (E_SMRAM). C_SMRAM is the traditional
SMRAM feature implemented in all Intel PCI chipsets. E_SMRAM is a new feature that
supports write-back cacheable SMRAM space up to 1 MB. To minimize power consumption
while the system is idle, the internal 82443BX Host Bridge clock is turned off (gated off) when
there is no processor and PCI activity. This is accomplished by setting the G_CLK enable bit
in the 82443BX power management register through the system BIOS.
4.3.1
Memory Organization
The memory interface of the 82443BX Host Bridge is available at the connector. This allows for
the following:
One set of memory control signals, sufficient to support up to three SO-DIMM sockets and six
banks of SDRAM at 100 MHz
One CKE signal for each bank
Memory features
not
supported by the 82443BX Host Bridge system controller in this product are:
Eight banks of memory
256-Mb memory devices
Second set of memory address lines (MAA[13:0])