A flash IC card with programmable security code

Author

Kai, Liu ; Li-yang, Pan ; Jun, Zhu

Author_Institution

Inst. of Microelectron., Tsinghua Univ., Beijing, China

fYear

2001

fDate

2001

Firstpage

584

Lastpage

587

Abstract

A flash IC card with programmable security code and embedded 2 Kb flash memory has been developed. Using the NORST (NOR with Select Transistor) flash EEPROM cell make this flash memory suitable for the embedded applications. The needed high positive and negative boosted voltages when programming and erasing are provided by the Dickson charge pump on chip. Two circuit techniques are proposed for the charge pump in order to minimize the influence of the body effect and threshold voltage. There are two main parts to the whole card: digital control logic and analog macro cell. A two level fuse circuit is adopted to distinguish the state of testing and normal use

Keywords

codes; digital control; embedded systems; flash memories; memory cards; security of data; smart cards; Dickson charge pump; NOR with select transistor; NORST flash EEPROM cell; analog macro cell; body effect; digital control logic; embedded applications; embedded flash memory; flash IC card; programmable security code; threshold voltage; two level fuse circuit; Circuit testing; Digital control; Digital integrated circuits; EPROM; Flash memory; Logic arrays; Logic circuits; Low voltage; Programmable logic arrays; Security;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC, 2001. Proceedings. 4th International Conference on

Conference_Location

Shanghai

Print_ISBN

0-7803-6677-8

Type

conf

DOI

10.1109/ICASIC.2001.982631

Filename

982631