MC68HC908LJ12 Datasheet, PDF (335/413 Pages) Freescale Semiconductor, Inc – 8-bit microcontroller units

Liquid Crystal Display Driver (LCD)
Table 16-2. Resistor Ladder Selection
FC
LC
Action
X
0
Each resistor is approximately 37 kΩ (default)
0
1
Each resistor is approximately 146 kΩ
1
1
Fast charge mode
LCCON[3:0] — LCD Contrast Control
These read/write bits select the bias voltage, V_bias. This voltage
controls the contrast of the LCD. Maximum contrast is set when
LCCON[3:0] = 0000; minimum contrast is when LCCON[3:0] = 1111.
Table 16-3. LCD Bias Voltage Control
LCCON3 LCCON2 LCCON1 LCCON0
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
Bias Voltage
(% of V_DD)
0.6 %
2.9 %
5.2 %
7.4 %
9.6 %
11.6 %
13.5 %
15.3 %
17.2 %
18.8 %
20.5 %
22.0 %
23.6 %
25.0 %
26.4 %
27.7 %
Technical Data
336
Liquid Crystal Display Driver (LCD)
MC68HC908LJ12 — Rev. 2.1
Freescale Semiconductor