Hardware Reference Manual
Glossary
GFK-3022E
September 2021
Glossary
61
Definitions vary as to what constitutes a legacy device. Some definitions include IDE as a legacy
device.
LPC
A low speed pin-count interface used for peripheral circuits such as Super I/O
controllers, which typically combine legacy-device support into a single IC.
LS
Least Significant
LVDS
Low Voltage Differential Signaling widely used as a physical interface for TFT flat panels.
LVDS can be used for many high-speed signaling applications. In this document, it refers only to
TFT flat-panel applications.
MS
Most Significant
NTSC
National Television Standards Committee video broadcast standard used in
North America.
PAL
Phase Alternating Line video broadcast standard used in many European countries.
POST
Power-on Self Test
PCIE
Next-generation high-speed Serialized I/O bus
PHY
Ethernet controller physical layer device
ROM
Read Only Memory, a legacy term often the device referred to as a ROM can actually be
written to, in a special mode. Such writable ROMs are sometimes called Flash ROMs. UEFI
Firmware is stored in ROM or Flash ROM.
RTC
Battery backed circuit in PC-AT systems that keeps system time and date as well
as certain system setup parameter.
SATA
Serial AT Attachment: serial-interface standard for hard disks.
SBC
Single Board Computer
SB-TSI
Side Band Temperature Sensor Interface
SCI
System Control Interrupt
SPD
Serial Presence Detect refers to serial EEPROM on DRAMs that has DRAM
