LAPIS Semiconductor ML610471, User Manual, Page: 226 / 281

ML610471/472/473/Q471/Q472/Q473 User's Manual
Chapter 18 LCD Drivers
18-1
18. LCD Driver
18.1 Overview
This LSI includes LCD drivers that display the contents that are set in the display register.
For the ML610471/472/473/Q471/Q472/Q473, the numbers of commons and segments and the maximum number of dots
are as shown in Table 18-1.
Table 18-1 Numbers of Commons/Segments and Maximum Number of Dots for ML610(Q)471/2/3
Product name
(ML610...)
471/Q471 472/Q472 473/Q473
2com-14seg 2com-18seg 2com-22seg
3com-13seg 3com-17seg 3com-21seg
4com-12seg 4com-16seg 4com-20seg
Number of
commons/segments
(changeable by
software)
5com-11seg 5com-15seg 5com-19seg
Maximum number
of dots
55 75 95
The LCD display function consists of four blocks as shown in Figure 18-1:
1. Display registers
2. Display control
3. Driver
Figure 18-1 Configuration of LCD Display Function
The display registers are used to store the contents to be displayed as bit patterns.
The bit pattern storage method depends on the specification of the LCD panel to be used (display pattern and assignment
of the COM pin and SEG pin) and the setting of the display allocation circuit.
The display control circuit generates LCD drive waveforms according to the characteristics of the LCD.
A bias, a bias voltage multiplying clock, a duty, and a frame frequency suitable for the LCD panel can be selected.
Display registers
Bias
Bias multiplying clock
Duty
Frame frequency
Display control
COM
SEG LCD
Panel
Drivers
DSPR14
DSPR15
DSPR00
DSPR01
DSPR02
COM driver
SEG driver