User manual

...the world's most energy friendly microcontrollers
2012-04-24 - Giant Gecko Family - d0053_Rev0.96 784
www.energymicro.com
1/3 bias and triplex multiplexing - LCD_SEG0-LCD_COM2
• DC voltage = 0 (over one frame)
• V
RMS
= 0.33 × V
LCD_OUT
• The LCD display pixel that is connected to LCD_SEG0 and LCD_COM2 will be OFF with this waveform
Figure 33.32. LCD 1/3 Bias and Triplex Multiplexing - LCD_SEG0-LCD_COM2
V
LC3
(V
SS
)
V
LC0
(V
LCD
)
V
LC1
(2/3V
LCD
)
V
LC2
(1/3V
LCD
)
-V
LC0
(V
LCD
)
-V
LC1
(2/3V
LCD
)
-V
LC2
(1/3V
LCD
)
Fram e Start Frame End
33.3.3.6 Waveforms with 1/3 Bias and Quadruplex Multiplexing
In this mode, each frame is divided into 8 periods. All COM lines can be multiplexed with all segment
lines. Figures show 1/3 bias and quadruplex multiplexing (waveforms show two frames).
Figure 33.33. LCD 1/3 Bias and Quadruplex Multiplexing - LCD_COM0
V
LC0
(V
LCD
)
V
LC1
(2/3V
LCD
)
V
LC3
(V
SS
)
V
LC2
(1/3V
LCD
)
Frame Start Fram e End
Figure 33.34. LCD 1/3 Bias and Quadruplex Multiplexing - LCD_COM1
V
LC0
(V
LCD
)
V
LC1
(2/3V
LCD
)
V
LC3
(V
SS
)
V
LC2
(1/3V
LCD
)
Frame Start Fram e End
Figure 33.35. LCD 1/3 Bias and Quadruplex Multiplexing - LCD_COM2
V
LC0
(V
LCD
)
V
LC1
(2/3V
LCD
)
V
LC3
(V
SS
)
V
LC2
(1/3V
LCD
)
Frame Start Fram e End