User manual

...the world's most energy friendly microcontrollers
2012-04-24 - Giant Gecko Family - d0053_Rev0.96 787
www.energymicro.com
adjusts the V
LCD_OUT
. The contrast is set by CONLEV in LCD_DISPCTRL, and can be adjusted relative
to either V
DD
(V
LCD
) or Ground using CONCONF in LCD_DISPCTRL. See Table 33.4 (p. 787) and
Table 33.5 (p. 787) , Table 33.5 (p. 787) and Table 33.6 (p. 788) .
Table 33.4. LCD Contrast
BIAS CONLEV Equation Range
00 00000-11111 V
LCD_OUT
= V
LCD
x (0.61 x (1 + CONLEV/(2
5
- 1))) CONLEV = 0 => V
LCD_OUT
= 0.61V
LCD
CONLEV = 31 => V
LCD_OUT
= V
LCD
01 00000-11111 V
LCD_OUT
= V
LCD
x (0.53 x (1 + CONLEV/(2
5
- 1))) CONLEV = 0 => V
LCD_OUT
= 0.53V
LCD
CONLEV = 31 => V
LCD_OUT
= V
LCD
10 00000-11111 V
LCD_OUT
= V
LCD
x (0.61 x (1 + CONLEV/(2
5
- 1))) CONLEV = 0 => V
LCD_OUT
= 0.61V
LCD
CONLEV = 31 => V
LCD_OUT
= V
LCD
11 00000-11111 V
LCD_OUT
= V
LCD
x (0.61 x (1 + CONLEV/(2
5
- 1))) CONLEV = 0 => V
LCD_OUT
= 0.61V
LCD
CONLEV = 31 => V
LCD_OUT
= V
LCD
Note
Reset value is maximum contrast
Table 33.5. LCD Contrast Function
CONCONF Function
0 Contrast is adjusted relative to V
DD
(V
LCD
)
1 Contrast is adjusted relative to Ground