M38514E6FP

3851 Group (Built-in 24 KB or more ROM) SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER REJ03B0066-0101Z Rev.1.01 Oct 15, 2003 DESCRIPTION The 3851 group (built-in 24 KB or more ROM) is the 8-bit microcomputer based on the 740 family core technology. The 3851 group (built-in 24 KB or more ROM) is designed for the household products and office automation equipment and includes serial I/O functions, 8-bit timer, I2C-BUS interface, and A-D converter. FEATURES Basic machine-language instructions ..................................... 71 Minimum instruction execution time ................................. 0.5 µs (at 8 MHz oscillation frequency) Memory size ROM ................................................................ 24K to 32K bytes RAM .................................................................... 640 to 1K bytes Programmable input/output ports ........................................... 34 Interrupts ................................................ 17 sources, 16 vectors Timers ............................................................................ 8-bit X 4 Serial I/O1 .................... 8-bit X 1(UART or Clock-synchronized) Serial I/O2 ................................... 8-bit X 1(Clock-synchronized) Multi-master I2C-BUS interface .................................. 1 channel PWM .............................................................................. 8-bit X 1 A-D converter ............................................... 10-bit X 5 channels Watchdog timer ......