The M55155/24XB07 is a CMOS 8-bit microcontroller manufactured by Renesas Electronics Corporation. This device has 24 pins, an on-chip 8-bit CPU, integrated RAM, ROM and I/O ports. The device is ideal for small, low-power embedded systems, such as home appliances, toys, and automotive systems. It features an 8-bit accumulator, 8-bit program counter, 8-bit stack pointer, 8-bit timer and interval timer, 6-channel 10-bit A/D converter, a serial communications circuit, and other peripheral functions. It also supports an external memory configuration that allows users to connect up to 16K bytes of ROM and 64 bytes of RAM. This device operates at a frequency of 10 MHz and has an operating voltage of 3V to 5.5V.