Toshiba PORTEGE M300 Maintenance Manual page 20

1 Hardware Overview
? South Bridge ; Intel ICH4-M (82801DBM)
? One Intel 82801DBM is used.
? 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)
? One PCI 7421 is used.
? 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
1-10
1.2 System Unit Block Diagram
PORTEGE M300 Maintenance Manual (960-504)