Title :
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
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;
Conference_Titel :
ASIC, 2001. Proceedings. 4th International Conference on
Conference_Location :
Shanghai
Print_ISBN :
0-7803-6677-8
DOI :
10.1109/ICASIC.2001.982631
