Advantech SOM-Express Design Guide
Chapter 1 Introduction 9
Chapter 1 Introduction
This design guide organizes and provides Advantech’s SOM carrier board design
recommendations for Advantech SOM-Express modules. It specifies common
mechanical and electrical characteristics in order to ensure the carrier board design
meets all the requirements needed to work properly.
1.1 Terminology
Table 1.1 Conventions and Terminology
AC’97 Audio Codec 97’
AGP Accelerated Graphics port refers to the AGP/PCI interface
CPU Central processing Unit
CRT Cathode Ray Tube
DDR2 Double Data Rate second generation SDRAM memory technology
DTOS Advantech’s Design To Order Service
EMI Electromagnetic Interference
ESD Electrostatic Discharge
SOM-Express New generation technology of System on module
FSB Front Side Bus, synonymous with Host or CPU bus
GMCH Refers to the Graphics Memory Controller Hub chipset component
I2C Inter-IC (a two wire serial bus created by Philips)
ISA International Standards Association
IDE (ATA) Integrated Drive Electronics (Advanced Technology Attachment)
INTx An interrupt request signal where x stands for interrupts A, B, C, and D.
LCD Liquid Crystal Display
LVDS
Low Voltage Differential Signaling: A high speed, low power data
transmission standard used for display connections to LCD panels.
MCH Refers to the Memory Controller Hub chipset component
NTSC National Television Standards Committee
PAL Phase Alternate Line
PCI Peripheral Component Interface
PCI-Express New generation PCI interface with serial interconnection technology
RTC Real Time Clock
SMBus System Management Bus.
SOM System On Module
SATA Serial ATA interface
SAS Serial attached SCSI interface
ULV Ultra-Low Voltage
USB Universal Serial Bus
