User Guide

1 Hardware Overview 1.2 System Unit Block Diagram
1-10 Satellite A40 Maintenance Manual (960-458)
q PC Card Controller Gate Array
• One YEBISU-SS gate array is used.
• This gate array has the following functions and components.
– PCI interface (PCI Revision2.2)
– CardBus/PC Card controller (Yenta2 Version2.2)
– SD memory card controller (SDHC Ver.1.2)
– SD IO card controller (Ver.1.0)
– SmartMedia controller (SMHC Ver.01/SMIL1.0)
– SIO (UART) controller (MS Debug Port Specification Ver.1.0)
– Docking station interface
– Q switch control, reset control
– External device interface
q BIOS ROM
• 8Mbit (Flash memory)
− 64KB used for logo
− 32KB used for setup and checksum
− 128KB used for system BIOS
− 64KB used for VGA-BIOS
− 64KB used for ACPI
− 8KB used for PnP
− 8KB used for password security
− 16KB used for booting
− 128KB are reserved
• 5.0V operation
• Access time : 120 ns or 90 ns
• Data transfer: 8-bit