a prescaler that can operate at frequencies up to 220 MHz, a PLL synthesizer, and an LCD controller/driver, all configured in one chip. Since, for its CPU, the µPD17015 adopts a 17K architecture which allows data memory to be manipulated directly without accumulators, programming efficiency is enhanced. Each instruction is 16 bits (one word) long. Since this microcontroller can operate at low voltages (VDD = 1.8 to 3.6 V), it is ideal for controlling portable, batterypowered units such as portab.