User manual

...the world's most energy friendly microcontrollers
2012-04-24 - Giant Gecko Family - d0053_Rev0.96 782
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Figure 33.24. LCD 1/2 Bias and Triplex Multiplexing - LCD_SEG0-LCD_COM2
V
LC0
(V
LCD
)
V
LC3
(V
SS
)
-V
LC0
(V
LCD
)
V
LC1
(1/2V
LCD
)
-V
LC1
(1/2V
LCD
)
Fram e Start Fram e End
33.3.3.5 Waveforms with 1/3 Bias and Triplex Multiplexing
In this mode, each frame is divided into 6 periods. LCD_COM[2:0] lines can be multiplexed with all
segment lines. Figures show 1/3 bias and triplex multiplexing (waveforms show two frames).
Figure 33.25. LCD 1/3 Bias and Triplex Multiplexing - LCD_COM0
V
LC0
(V
LCD
)
V
LC3
(V
SS
)
V
LC1
(2/3V
LCD
)
V
LC2
(1/3V
LCD
)
Fram e Start Frame End
Figure 33.26. LCD 1/3 Bias and Triplex Multiplexing - LCD_COM1
V
LC0
(V
LCD
)
V
LC3
(V
SS
)
V
LC1
(2/3V
LCD
)
V
LC2
(1/3V
LCD
)
Fram e Start Frame End
Figure 33.27. LCD 1/3 Bias and Triplex Multiplexing - LCD_COM2
V
LC0
(V
LCD
)
V
LC3
(V
SS
)
V
LC1
(2/3V
LCD
)
V
LC2
(1/3V
LCD
)
Fram e Start Frame End
1/3 bias and triplex multiplexing - LCD_SEG0
The LCD_SEG0 waveform illustrates how different segment waveforms can be multiplexed with the
COM lines in order to turn on and off LCD pixels. As illustrated in the figures below, this waveform will
turn ON pixels connected to LCD_COM1, while pixels connected to LCD_COM0 and LCD_COM2 will
be turned OFF.