... based on 8051 CPU core, is a microcontroller designed for Smart Card or USB key device application. 07AC, based on 8051 ... , is a microcontroller designed for Smart Card or USB device application. The instruction set is compatible with that of standard 8051, ... for USB key/token, contact Smart Card, which will be used for cryptology application, e-banking, PKI card, SIM card, pat TV, city card etc ...