Product manual

3ECURITY SYSTEMS s

(ANDHELD SCANNERS s

-EMORY CARDS ARE BASED ON TWO TECHNOLOGIES ./2 TECHNOLOGY AND .!.$ TECHNOLOGY

./2 TECHNOLOGY PROVIDES HIGHSPEED RANDOM ACCESS CAPABILITIES WHERE DATA AS

SMALL AS A SINGLE BYTE CAN BE RETRIEVED ./2 TECHNOLOGYBASED MEMORY CARDS ARE

OFTEN FOUND IN MOBILE PHONES PERSONAL DIGITAL ASSISTANTS AND COMPUTERS .!.$

TECHNOLOGY WAS INVENTED AFTER THE ./2 TECHNOLOGY AND IT ALLOWS SEQUENTIAL ACCESS TO

THE DATA IN SINGLE PAGES BUT CANNOT RETRIEVE SINGLE BYTES OF DATA LIKE ./2 FLASH .!.$

TECHNOLOGYBASED MEMORY CARDS ARE COMMONLY FOUND IN DIGITAL CAMERAS MOBILE

PHONES AUDIO AND VIDEO DEVICES AND OTHER DEVICES WHERE THE DATA IS WRITTEN AND READ

SEQUENTIALLY

4HERE ARE MANY DIFFERENT TYPES OF MEMORY CARDS AVAILABLE IN THE MARKET 3OME OF THE MOST

COMMONLY KNOWN MEMORY CARDS ARE

3MART MEDIA 3- CARD s

-ULTIMEDIA CARD --# s

#OMPACT mASH #& CARD s

-EMORY STICK -3 CARD s

-ICRODRIVE s

X$ CARD s

3ECURE DIGITAL 3$ CARD s

4HE SPECIlCATIONS AND DETAILS OF EACH CARD ARE SUMMARIZED IN THE FOLLOWING SECTIONS

3.2 Smart Media Card

4HE 3- CARD WAS lRST DEVELOPED IN  BY 4OSHIBA AND WAS ALSO CALLED THE 3OLID 3TATE

&LOPPY $ISC #ARD 33&$# 4HE 3- CARD CONSISTS OF A SINGLE .!.$ mASH CHIP EMBEDDED IN

A THIN PLASTIC CARD AND IT IS THE THINNEST CARD OF ALL &IGURE  SHOWS A TYPICAL 3- CARD 4HE

DIMENSIONS OF THE CARD ARE  s  s  MM AND IT WEIGHS ONLY  G 4HE CARD CONSISTS

OF A mAT ELECTRODE TERMINAL WITH  PINS

4HE 3- CARD WAS MAINLY USED IN &UJI AND /LYMPUS CAMERAS WHERE IT HAD APPROXIMATELY

 OF THE MEMORY CARD SHARE IN  4HE CAPACITIES OF THESE CARDS RANGED FROM  TO

 -" AND THE DATA TRANSFER RATE WAS APPROXIMATELY  -"S 3- CARDS STARTED HAVING

PROBLEMS AS CAMERA RESOLUTION INCREASED CONSIDERABLY AND CARDS GREATER THAN  -" WERE

108 Chapter 3