Lauw Lim Un Tung wrote: > I want to know difference about flash memories and EEPROM. Tung: If you're asking, "What is the difference between the 'flash memory' used in the 16F84 and the 'EEPROM' used in the 16C84?", the answer is: There IS no difference; the two memory technologies are identical. If you're asking the more general question, the simple answer is: EEPROM can be erased one byte at a time, while flash must be erased in large blocks. -Andy === Andrew Warren - fastfwd@ix.netcom.com === Fast Forward Engineering - Vista, California === http://www.geocities.com/SiliconValley/2499