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IC Card Performance up by using high speed SRAM with thin battery

IP.com Disclosure Number: IPCOM000126907D
Original Publication Date: 2005-Aug-10
Included in the Prior Art Database: 2005-Aug-10
Document File: 1 page(s) / 36K

Publishing Venue

IBM

Abstract

Disclosed is a memory circuit for IC card using static RAM with thin battery.

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IC Card Performance up by using high speed SRAM with thin battery

An IC Card usually has a nonvolatile memory such as EEPROM or Flash memory for data back up as power down, but most of these access speed is quite slow. Therefore it's difficult to run complicated application programs with high level operating system on it. To solve this problem, it's effective to have the high speed static RAM with a thin battery on the IC card, see Fig.1.

ROM

CPU

EEPROM or FlashMemory

RAM

Other I/O

High speed SRAM for backup

 Thin battery

Fig.1 The high speed staticRAM with thin battery instead of EEPROM or Flash memory.

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