Document contains brief description of DF6805 core functionality. The DF6805 is a advanced 8-bit MCU IP Core with highly so-phisticated, on chip peripheral capabilities. DF6805 soft core is binary-compatible with the industry standard 68HC05 8-bit microcontrol-ler and can achieve a performance 45-100 million instructions per second. There are two configurations of DF6805: Harvard where data and program buses are separated, and von Neumann with common program and data bus DF6805 has FAST architecture that is 4.1 times faster compared to original im-plementation. Core in standard configuration has integrated on chip major peripheral func-tion.