The Z84C2006PEG is a single-chip, 4-bit microcontroller from ZiLOG. It is based on their Z80 CPU core and has 256 bytes of ROM, 32 bytes of RAM, and 16 I/O ports. It supports up to 25 MHz clock frequencies, and has an 8 x 8-bit multiply-accumulate unit for high speed mathematical calculations. It also features built-in UARTs, SPI, and I2C modules. It is packaged in a 48-pin dual in-line package and operates connected with a battery. It is suitable for embedded applications requiring low-power consumption.