M9203 is an integrated circuit (IC) manufactured by Tamura Corporation. It is an 8-bit microcontroller with 2K bytes of EPROM and 64 bytes of RAM. The M9203 has a variety of features, including 16 I/O ports, serial communication, analog-to-digital converter, watchdog timer, a wide range of interrupts and timer counter functions, and interrupt mask control. The chip also integrates power control, reset timer, clock and oscillator circuit, and temperature sensing.