Few Abbreviation related to PCB designing and their explanations.

ADC- Analogue to Digital Converter 

 AGND- Analogue Ground - separate ground for analogue signals 

 Auto-MDIX -Automatically Medium Dependent Interface Crossing - a PHY with Auto-MDIX is able to detect whether RX and TX need to be crossed (MDI or MDIX) 

 CAD-Computer-Aided Design

 CAN-Controller Area Network - a bus that is manly used in automotive and industrial environment 

 CDMA-Code Division Multiplex Access - an abbreviation often used for a mobile phone standard for data communication 

 CEC-Consumer Electronic Control - a HDMI feature that allows to control CEC compatible devices 

 CPU-Central Processing Unit 

 CSI-Camera Serial Interface 

 DAC-Digital to Analogue Converter 

 DDC -Display Data Channel - an interface for reading out the capability of a monitor, in this document DDC2B (based on I2C) is always meant 

 DRC-Design Rule Check - a tool for checking whether all design rules are satisfied in a CAD tool 

 DSI-Display Serial Interface 

 DVI-Digital Visual Interface. Digital signals are electrical compatible with HDMI 

 DVI-A-Digital Visual Interface Analogue only. Signals are compatible with VGA 

 DVI-D-Digital Visual Interface Digital only. Signals are electrical compatible with HDMI 

 DVI-I-Digital Visual Interface Integrated. Combines digital and analogue video signals in one connector 

 EDA- Electronic Design Automation - software for schematic capture and PCB layout (CAD or ECAD) 

 EDID- Extended Display Identification Data - timing setting information provided by the display in a PROM 

 EMC -Electromagnetic Compatibility -theory of unintentional generation, propagation, and reception of electromagnetic energy EMI Electromagnetic Interference - high frequency disturbances 

 eMMC- Embedded Multi Media Card - flash memory combined with MMC interface controller in a BGA package, used as internal flash memory 

 ESD Electrostatic Discharge - high voltage spike or spark that can damage electrostatic-sensitive devices 

 FPD-Link Flat Panel Display Link - high-speed serial interface for liquid crystal displays. In this document, also called LVDS interface.

 GBE Gigabit Ethernet - Ethernet interface with a maximum data rate of 1000Mbit/s GND Ground

  GPIO- General Purpose Input/Output pin that can be configured to be either an input or output

  GSM- Global System for Mobile Communications 

 HDA- High Definition Audio (HD Audio) - digital audio interface between CPU and audio codec 

 HDCP -High-Bandwidth Digital Content Protection - a copy protection system that is used by HDMI besides others 

 HDMI -High-Definition Multimedia Interface - it combines audio and video signal for connecting monitors, TV sets or Projectors, electrical compatible with DVI-D I2C Inter-Integrated Circuit- a two wire interface for connecting low speed peripherals I2S Integrated Interchip Sound- a serial bus for connecting PCM audio data between two devices

  IrDA- Infrared Data Association - an infrared interface for connecting peripherals

  JTAG- Joint Test Action Group - widely used debug interface

  LCD- Liquid Crystal Display 

 LSB- Least Significant Bit 

 LVDS- Low-Voltage Differential Signaling, electrical interface standard that can transport very high speed signals over twisted-pair cables. Many interfaces like PCIe or SATA use this interface. Since the first successful application was the Flat Panel Display Link, LVDS became a synonymous for this interface. In this document, the term LVDS is used for the FPD-Link interface.

  MIPI- Mobile Industry Processor Interface Alliance 

 MDI- Medium Dependent Interface, physical interface between Ethernet PHY and cable connector 

 MDIX- Medium Dependent Interface Crossed, an MDI interface with crossed RX and TX interfaces 

 mini PCIe -PCI Express Mini Card, card form factor for internal peripherals. The interface features PCIe and USB 2.0 connectivity

  MMC- MultiMediaCard, flash memory card MSB Most Significant Bit  mSATA Mini-SATA - a standardized form factor for small solid state drive, similar dimensions as mini PCIe 

 MXM3 -Mobile PCI Express Module (second generation) - graphic card standard for mobile device. The Apalis form factor uses the physical connector but not the pin-out and the PCB dimensions of the MXM3 standard. 

  N/A -Not Available

  N/C- Not Connected 

 OD- Open Drain 

 OTG USB- On-The-Go - a USB host interface that can also act as USB client when connected to another host interface OWR One Wire (1-Wire) - low speed interface which needs just one data wire plus ground

  PCB- Printed Circuit Board

  PCI- Peripheral Component Interconnect - parallel computer expansion bus for connecting peripherals

  PCIe PCI Express - high-speed serial computer expansion bus that replaces the PCI bus 

 PCM Pulse-Code Modulation - digitally representation of analogue signals. Standard interface for digital audio PD Pull Down Resistor PHY Physical Layer of the OSI model PMIC Power Management IC, integrated circuit that manages amongst others the power sequence of a system

  PU- Pull-Up Resistor

  PWM- Pulse-Width Modulation

  RGB- Red Green Blue - color channels in common display interfaces

  RJ45- Registered Jack - a common name for the 8P8C modular connector that is used for Ethernet wiring

  RS232 -Single ended serial port interface

  RS422 -Differential signaling serial port interface, full duplex 

 RS485- Differential signaling serial port interface, half duplex, multi drop configuration possible 

 R-UIM -Removable User Identity Module -  identifications card for CDMA phones and networks, an extension of the GSM SIM card 

 These are few abbereviations which a PCB Layout designer needs to know. Because they will find this abberiviations oftenly.

 So Enjoy Reading and Keep Reading my Blog.

 Plz send me if any querry is there..

 Thanks,

 Ruby

 My mail Id- jruby.kumari@gmail.com.


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