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Mitsubishi Electric PH440 User Manual: Electronics; Processor; Core Logic

Pentium ii processor-based nlx profile motherboard.
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P H 4 4 0 N L X M o t h e r b o a r d U s e r G u i d e
4

ELECTRONICS

PROCESSOR

The PH440 NLX motherboard accepts the following Pentium II
speed of 100MHz.
Processor Speed
(MHz)
The processor core voltages are generated by switched-mode regulators on the motherboard to
the Intel VRM8.2 specification. The design meets the 100MHz Slot 1 flexible motherboard
recommendations and supports boxed products (processors), including a CPU fan supply.

CORE LOGIC

The core logic is based around the Intel 440BX PCI AGP Controller (PAC) and the PIIX4e
multi-function ISA bridge. The features of each are summarised below.
440BX Host bridge
Slot1 host bridge
DRAM controller supporting SDRAM main memory with optional ECC
PCI 2.1 compliant
AGP compliant target
Virtual PCI to PCI bridge to support AGP bus
Packaged in a 492 Pin BGA
PIIX4e Multifunction ISA Bridge
PCI to ISA bridge
Dual UltraDMA33 IDE controller
ISA system peripherals (timers, DMA etc.)
Dual USB controller (12Mbps or 1.5Mbps)
SMbus controller (motherboard management)
Real-time clock
ACPI power management logic
Packaged in a 324 pin BGA
The two IDE interfaces are completely independent and can operate concurrently. Both can also
be configured as a PCI bus master.
MITSUBISHI ELECTRIC MOTHERBOARD DIVISION
Core/bus ratio
350
400
450
®
Bus speed MHz
3.5
4.0
4.5
S e p t e m b e r 1 9 9 8
processors operating at a bus
100
100
100
PAGE 19 OF 51

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