User manual

...the world's most energy friendly microcontrollers
2012-04-24 - Giant Gecko Family - d0053_Rev0.96 778
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Figure 33.9. LCD 1/2 Bias and Duplex Multiplexing - LCD_SEG0-LCD_COM0
V
LC0
(V
LCD
)
V
LC3
(V
SS
)
-V
LC0
(V
LCD
)
Frame Start Frame End
V
LC1
(1/2V
LCD
)
-V
LC1
(1/2V
LCD
)
1/2 bias and duplex multiplexing - LCD_SEG0-LCD_COM1
• DC voltage = 0 (over one frame)
• V
RMS
= 0.35 × V
LCD_OUT
• The LCD display pixel that is connected to LCD_SEG0 and LCD_COM0 will be OFF with this waveform
Figure 33.10. LCD 1/2 Bias and Duplex Multiplexing - LCD_SEG0-LCD_COM1
V
LC0
(V
LCD
)
V
LC3
(V
SS
)
-V
LC0
(V
LCD
)
Frame Start
Frame End
V
LC1
(1/2V
LCD
)
-V
LC1
(1/2V
LCD
)
33.3.3.3 Waveforms with 1/3 Bias and Duplex Multiplexing
In this mode, each frame is divided into 4 periods. LCD_COM[1:0] lines can be multiplexed with all
segment lines. Figures show 1/3 bias and duplex multiplexing (waveforms show two frames).
Figure 33.11. LCD 1/3 Bias and Duplex Multiplexing - LCD_COM0
V
LC0
(V
LCD
)
V
LC1
(2/3V
LCD
)
V
LC3
(V
SS
)
V
LC2
(1/3V
LCD
)
Frame Start Frame End
Figure 33.12. LCD 1/3 Bias and Duplex Multiplexing - LCD_COM1
V
LC0
(V
LCD
)
V
LC3
(V
SS
)
Frame Start Frame End
V
LC1
(2/3V
LCD
)
V
LC2
(1/3V
LCD
)