采用51单片机模拟i2c，驱动24c64，可以直接应用。-With 51 single-chip analog i2c, driver 24c64, can be applied directly.

Basically it waits for a interrupt (push button) and checks if an eeprom 24c64 has FF in all its address then turns a led if true, this is only if the switch in port D is closed, if not, it writes a byte number "i" in the adress number "i" and then v