MC68HC908LJ24 Datasheet, PDF (369/464 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Liquid Crystal Display (LCD) Driver
I/O Registers
Table 17-2. 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 set when LCCON[3:0] =%1111.
Table 17-3. 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
MC68HC908LJ24/LK24 — Rev. 2
MOTOROLA
Liquid Crystal Display (LCD) Driver
For More Information On This Product,
Go to: www.freescale.com
Data Sheet
369