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ML51/ML54/ML56
Sep. 01, 2020
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ML51/M
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L56
Series
Tec
hnical Reference
Manual
6.17 LCD Driver
6.17.1 Overview
The Liquid Crystal Displays (LCD) panel is widely used to meet the display need in applications. The
ML54/ML56 series is equipped with LCD driver that can directly drive the LCD panel with 4 COM x 32
SEG , 6 COM x 30 SEG or 8 COM x 28 SEG. Use the corresponding COM and SEM according to the
definition of multiple function pin. The LCD driver supports 1/4 duty, 1/6 duty, or 1/8 duty. The driving
voltage supports 1/2 bias, 1/3 bias or 1/4 bias with waveform type A or Type B. The source of LCD
clock is based on the choice of LIRC or LXT. The LCD display can keep display on or off during chip in
power-down mode. The LCD power supply VLCD source is selectable from internal charge pump,
external VLCD pin or analog power AV
DD
.
6.17.2 Features
1.8V to 5.5V LCD operating voltage.
Selectable LCD clock source from LIRC or LXT
1/2, 1/3, 1/4 bias selectable
Maximum 4 COM x 32 SE.G. 6 COM x 30 SE.G. 8 COM x 28 SEG
Supports buffer mode for high current driving
Support enhaced resistor mode for low power application
Support external VLCD source or AV
DD
as LCD voltage source.
Support programmable internal charge pump circuit for LCD voltage level is higher or lower than
V
DD
application.
Support blink function.
Suppot display on or off during chip in Power-down mode