... , is a microcontroller designed for Smart Card or USB key device application. 07AC, based on 8051 CPU core, ... interface security IC, 07AC could be developed for USB key/token, contact Smart Card, which will be used for ... source alternately - frequency of internal clock is 5MHz, 10 MHz, 20 MHz or 40MHz Two 16-bit timers ... /IEC 7816-3 - T=0 and T=1 supported - 10-level baud rates FD = 11, 12, 13, 18, 91 ...