The N539T170 is an 8-bit uP base with a high sound quality speech and wavetable melody synthesizer and a 2000 dot LCD driver unit. It provides charge pump circuits, two pages of dedicated LCD RAM, and a 4-level grey scale LCD display to provide good quality, sharp pictures. The N539T170 can synthesize 8-channel speech and/ or wavetable melody in high sound quality, while simultaneously display LCD. It offers multiple power modes to minimize power dissipation according to different speech, melody, and LCD needs. The Serial Interface Manager (SIM) is designated for cartridge applications. Using the SIM, the N539T170 can access Nuvoton-proprietary, serial-memory chips W55FXX and W551CXXX.