Asus 810E User Manual download pdf (Page 125)

ASUS CUWE User’s Manual 125

7 . APPENDIX

Glossary

7. APPENDIX

SPD for SDRAM module

Serial Presence Detect (SPD) is most like an ID detect for SDRAM module, it using

a EEPROM component on DIMM module for storing module configuration infor-

mation inside. The Serial Presence Detect function is implemented using a 2048 bit

EEPROM component. This nonvolatile storage device contains data programmed

by the DIMM manufacture that identifies the module type and various SDRAM

organization and timing parameters.

System Disk

A system disk contains the core file of an operating system and is used to boot up the

operating system.

UltraDMA

Ultra DMA/33 is a "synchronous DMA" protocol designed by Intel. This function is

included into Intel's PIIX4 chipset. The traditional IDE transfer only uses one edge

of the data stroke as the data transfer. Ultra DMA/33 uses both edges of data strobe

when the data is transferred. Hence, the data transfer rate is double of the PIO mode

4 or DMA mode 2 (16.6MB/s x2 = 33MB/s) on ATA-2 devices.

Ultra ATA/66, also known as Ultra DMA/66, is an extension of current Ultra ATA/

33 interface. This new high-speed interface has doubled the Ultra ATA/33 burst data

transfer rate to 66.6 Mbytes/sec and maximized disk performance under current PCI

local bus environment

USB (Universal Serial Bus)

A 4-pin serial cable bus that allows up to 127 plug and play computer peripherals

such as keyboard, mouse, joystick, scanner, printer, modem, and monitor to share a

bandwidth through a host scheduled token based protocol. This allows attaching or

detaching while the host and other peripherals are in operation. Supports synchro-

nous and asynchronous transfer types over the same set of wires up to 12Mbit/sec.

USB 2.0 provides twice the transfer rate compared to USB 1.0 and competes with

the 1394 standard.

Wake-On-Lan

Computer will automatically wake-up upon receiving a wake-up packet through a

Network interface when it is under power soft-OFF, suspend or sleep mode.

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Asus 810E User Manual Page 125