Chapter 4 Applications

?Public services:Cards issued by local government, Resident cards, Drivers licenses, Passports, Telephone cards, etc.?Payment function:Bank cash cards, Credit cards issued by banks and credit loan companies, Electronic money, Amuse-ment cards, etc.?Wireless communications: SIM cards for GSM ?Broadcasting:Receiving fee-based television broadcasts at home ?Medical insurance: Health insurance certificate, recording medical information, etc. ?Others: - Member cards issued by companies, department stores, shopping areas, etc. - Purchase and sale of products and provision of services over the Internet (E-Commerce), etc.

4.5 About Battery Backup

One of the necessary conditions of work memory for equipments used on production lines is that it has non-volatile data. This is required besides random accessibility to cope with equipment breakdowns and sudden poweroutages. At present, SRAM is commonly used for work memory, with lithium batteries or other power sources for datastorage. In general, batteries need to be replaced approximately once a year, but battery life is sometimes shorter.It is therefore necessary to constantly monitor battery conditions. In addition, mechanical vibrations from motorsand other device inside a system can lead to battery leakage, possibly causing equipment to break down. There- fore, replacing battery-backed-up SRAM (BBSRAM) with FRAM frees operators from the troublesome mainte-nance or leakage problems that batteries present.
SRAM BatteryWhich? FRAM

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Clean, maintenance-free environment Why not FRAM? 26