ATmega48PA/88PA is a high performance, low power AVR® 8-bit microcontroller, with advanced RISC architecture, 131 powerful instructions, single clock cycle execution, 32 x 8 general purpose working registers, fully static operation, up to 20 MIPS throughput at 20 MHz, on-chip 2-cycle multiplier, with high endurance non-volatile memory segments, 4K/8K bytes of In-System Self-Programmable Flash program memory (ATmega48PA/88PA), 256/512 Bytes EEPROM (ATmega48PA/88PA), 512/1K Bytes Internal SRAM (ATmega48PA/88PA), Write/Erase Cycles: 10,000 Flash/100,000 EEPROM, Data retention: 20 years at 85°C/100 years at 25°C(1), Optional Boot Code Section with Independent Lock Bits, In-System Programming by On-chip Boot Program, True Read-While-Write Operation, Programming Lock for Software Security