DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 REGISTER & MEMORY MAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 FLASH PROGRAM MEMORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124.1INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124.2MAIN FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124.3PROGRAMMING MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124.4ICC INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134.5MEMORY PROTECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Features Memories8 Kbytes program memory: single voltage ex-tended Flash (XFlash) Program memory withread-out protection, In-Circuit Programmingand In-Application programming (ICP andIAP), data retention: 20 years at 55C.384 bytes RAM256 bytes data EEPROM with read-out pro-tection. 300K write/erase cycles guaranteed,data retention: 20 years at 55C.Clock, Reset and Supply ManagementEnhanced reset systemEnhanced low voltage supervisor (LVD) formain supply and an auxiliary voltage detector(AVD) with interrupt capability for implement-ing safe power-down proceduresClock sources: Internal RC 1% oscillator,crystal/ceramic resonator or external clock Optional x4 or x8 PLL for 4 or 8MHz internalclockFive Power Saving Modes: Halt, Active-Halt,Wait and Slow, Auto Wake Up From HaltI/O PortsUp to 15 multifunctional bidirectional I/O lines7 high sink outputs5 TimersConfigurable Watchdog TimerTwo 8-bit Lite Timers with prescaler, 1 realtime base and 1 input captureTwo 12-bit Auto-reload Timers with datasheet,please check at www.st.comPlease