Datasheet

Chapter 9 Liquid Crystal Display Driver (S08LCDV1)
MC9S08LC60 Series Data Sheet: Technical Data, Rev. 4
Freescale Semiconductor 167
Figure 9-23. Power Connections for Contrast Control
9.6.3 LCD Power Consumption
The following tables show relative power consumption from V
DD
for the different modes available for the
LCD module.
Table 26. Relative Power Consumption, 5 V
Mode Typical Voltage
LCD Display Voltage
Range
V
DD
Supply
Range
V
DD
Current
Consumption Level
V
LL2
connect to V
DD
V
DD
= 3.333 V V
DD
= 3 V ~ 3.6 V 3 V ~ 3.6 V low
Tripler Buffered Mode V
LCD
= 1.6667 V V
LCD
= 1.5 V ~ 1.8 V 2.4 V ~ 3.6 V high
Tripler Bypassed Mode V
LCD
= 1.6667 V V
LCD
= 1.5 V ~ 1.8 V 1.8 V ~ 3.6 V lowest
Note: Current consumption data based on using the external 32-kHz oscillator with LCD configured using the low-power wave
forms option, a 1/4 duty, and a 32-Hz frame frequency. C
LCD
= C
BYLCD
= 100 nF; 160 segment 2000 pF LCD panel.
Table 27. Relative Power Consumption, 3 V
Mode Typical Voltage
LCD Display Voltage
Range
V
DD
Supply
Range
V
DD
Current
Consumption Level
V
LL2
connect to V
DD
V
DD
= 2 V V
DD
= 1.8 V ~ 2.2 V 1.8 V ~ 2.2 V high
Tripler Buffered Mode V
LCD
= 1 V V
LCD
= 0.9 V ~ 1.1 V 2.0 V ~ 3.6 V highest
Tripler Bypassed Mode V
LCD
= 1 V V
LCD
= 0.9 V ~ 1.1 V 1.8 V ~ 3.6 V lowest
V
LL3
connect to V
DD
V
DD
= 3 V V
DD
= 2.7 V ~ 3.3 V 2.7 V ~ 3.3 V low
Doubler Buffered Mode V
LCD
= 1.5 V V
LCD
= 1.35 V ~ 1.65 V 2.4 V ~ 3.6 V highest
Note: Current consumption data based on using the external 32-kHz oscillator with LCD configured using the low-power wave
forms option, a 1/4 duty, and a 32-Hz frame frequency. C
LCD
= C
BYLCD
= 100 nF; 160 segment 2000 pF LCD panel.
LCD GLASS PANEL
FP[40:0]
BP[3:0]
LCD Power Pins
V
cap1
V
cap2
C
BYLCD
V
LCD
V
LL3
V
LL2
V
LL1
LCD charge pump capacitance
LCD Power Supply
R
9S08LC60
NOTE:
Contrast control configuration when
LCD is powered using external V
LCD
This is the recommended configuration
for contrast control.
V
LCD
specified between 0.9 and 1.8
volts.
C
LCD