
5
Intel
a
Celeron
Processor Mobile Module MMC-1
At 400 MHz, 366 MHz, 333 MHz, and 300 MHz
1.0
INTRODUCTION
This document provides the technical information for
integrating the Celeron Processor Mobile Module Connector
1 (MMC-1) into the latest notebook systems for today’s
notebook market.
Building around this modular design gives the system
manufacturer these advantages:
Avoids complexities associated with designing high-
speed processor core logic boards.
Provides an upgrade path from previous Intel
Mobile
Modules using a standard interface.
1.1
Revision History
Date
3/1999
5/1999
Revision
1.0
2.0
Updates
Initial release.
§
New 333-MHz processor
speed
§
POS/STR corrections
§
ESD clarification
§
VR_ON and
VR_PWRGD correction
§
L2 cache correction
§
Power sequence
clarification
New 400-MHz processor
speed
Updated Table 22
6/1999
3.0
2/2000
4.0
2.0
ARCHITECTURE OVERVIEW
The Celeron processor mobile module MMC-1 is a highly
integrated assembly containing the mobile Celeron
processor and its immediate system-level support. The
Celeron processor mobile module MMC-1 offers speeds of
400 megahertz,366 megahertz, 333 megahertz, 300
megahertz, and 266 megahertz. All processor speeds have
a 66-megahertz processor system bus (PSB) speed.
The PIIX4E/M PCI/ISA Bridge is one of two large-scale
integrated devices of the Intel 440DX PCIset. A notebook’s
system electronics must include a PIIX4E/M device to
connect to the Celeron processor mobile module. The
PIIX4E/M provides extensive power management
capabilities and supports the second integrated device, the
Intel 82443DX Host Bridge. Key features of the Intel
82443DX Host Bridge system controller include the DRAM
controller, which supports EDO at 3.3 volts with a burst read
at 7-2-2-2 (60 nanoseconds) or SDRAM at 3.3 volts with a
burst read at 8-1-1-1 (66 megahertz, CL=2).
The 82443DX Host Bridge also regulates the PCI clock on
the PCI bus. The 82443DX clock enables Self Refresh mode
of EDO or SDRAM during Suspend mode and is compatible
with SMRAM (C_SMRAM) and Extended SMRAM
(E_SMRAM) modes of power management. E_SMRAM
mode supports write-back cacheable SMRAM up to 1
megabyte.
A thermal transfer plate (TTP) on the 82443DX Host Bridge
and the CPU provides heat dissipation and a thermal attach
point for the notebook manufacturer’s thermal solution.
An on-board voltage regulator converts the system DC
voltage to the processor’s core and I/O voltage. Isolating the
processor voltage requirements allows the system
manufacturer to incorporate different processor variants into
a single notebook system.
Supporting input voltages from 5 volts to 21 volts, the
processor core voltage regulator enables an above 80
percent peak efficiency and decouples processor voltage
requirements from the system.
The Celeron processor mobile module MMC-1 also
incorporates Active Thermal Feedback (ATF) sensing,
compliant to the
ACPI Specification Rev 1.0
. A system
management bus (SMBus) supports the internal and external
temperature sensing with programmable trip points.