1.2 System Unit Block Diagram 1 Hardware Overview
PORTEGE M300 Maintenance Manual (960-504) 1-9
South Bridge ; Intel ICH4-M (82801DBM)
¾ One Intel 82801DBM is used.
¾ This gate array has the following features:
• PCI 3.3V/5V Tolerance interface
• Provides Steerable PCI interrupt for PCI device P&P
• Enhanced DMA controller
• Interrupt controller
• Counter / Timer
• Supports Distribute DMA.
• Supports PC/PCI DMA.
• Supports Serial IRQ.
• LPC host controller
• Supports Plug-and-Play.
• Supports ACPI
• Internal PCI IDE Controller
• USB interface
• SMBus interface
• Super I/O Interface
• Audio system
• SW modem interface
• 421-ball 31×31mm BGA Package
PC Card Controller ; Texas Instruments (PCI7421)
¾ One PCI 7421 is used.
¾ This gate array has the following functions and components.
• PCI interface (PCI Revision2.2)
• CardBus/PC Card controller (Yenta2 Version2.2)
• SD/MMC card controller (SDHC Ver.1.2)
• SD IO card controller (Ver.1.1)
• Memory Stick/Memory Stick Pro Card Controller
• xD Picture Card Controller
• IEEE1394a Controller 2 port
• BGA Package
Firmware Hub (FWH)
One 4Mbit FWH (STMicro M50FW040N5G) is used.
Sound Controller
AC-Link (South Bridge), STAC9750 (Sound Codec) and AN12941A-VF (Audio Amp)
are used.
