Nuvoton NuMicro ML54 series is a low-power microcontroller, based on 1T 8051 core, embedded 64 KB flash and 4 KB SRAM, built-in LCD driver, running up-to 24 MHz. For low power operation, it runs less than 100 µA/MHz in normal run mode, and the power-down current is below 2 µA with LCD panel display on. The ML54 series operates from 1.8V to 3.6V and-40°C to 105°C.
NuMicro ML54 series builts in 4 COM x 32 SEG, 6 COM x 30 SEG, 8 COM x 28 SEG LCD controller to drive up to 224 dots, and supports the Type-A and Type-B LCD panel. It provides two VLCD input sources, one is external voltage, and another is an internal charge pump, The internal charge pump keeps the VLCD constant voltage to maintain the display quality of the LCD panel while VDD input changes. There are two VLCD driving modes, external capacitor mode, and internal resistor mode. The external capacitor mode with up to 200mA strong driving current to support a large size panel; the internal resistor mode drives a small size panel and reduces power consumption.