DEMO9S08LIN Freescale, DEMO9S08LIN Datasheet - Page 154

• Manufacturer Part Number: DEMO9S08LIN
• Manufacturer: Freescale

Specifications of DEMO9S08LIN

• Lead Free Status / RoHS Status: Compliant

Chapter 9 Liquid Crystal Display Driver (S08LCDV1)
The output of the voltage divider block is V
Using the charge pump, the value of V
equal to the voltage required to energize the LCD panel, V
approximately 3-V; while for 5-V LCD glass, V
Depending on the LCDCPMS bit configuration, V
Section 9.4.4, “LCD Charge Pump, Voltage Divider, and Power Supply
selected V
In addition to V
(LCDCPEN = 1). For a typical LCD panel, the bias voltages in 1/3 bias mode would be:
9.4.4.2.2
When VSPUPPLY[1:0] = 11, powersw1, powersw2, and powersw3 are deasserted. Moreover with
powersw3 deasserted, the buffer is disabled ((~BBYPASS & pwersw3) = 0), so V
in a tri-state condition. V
requires an external power source for V
charge pump is enabled, external power must be applied to either V
9.4.4.2.3
V
VSUPPLY[1:0] = 00 or 01(see
must be enabled (LCDCPEN = 1).
VSUPPLY[1:0] bit field when using both 3-V and 5-V LCD panels.
154
DD
•
•
•
•
is specified to be from 1.8 V to 3.6 V. V
V
V
V
V
3
2
1
0
LL1
= V
= V
= V
= V
1.4 V
1.5 V
1.7 V
1.8 V
V
LCD
and V
LL3
LL2
LL1
SS
V
segment. Since V
configured so that it is 3 V or 5 V, depending on the LCD panel specification.
LCD External Power Supply, VSPUPPLY[1:0] = 11
LCD Internal Power Supply, VSUPPLY[1:0] = 00 or 01
LL1
LCDON
= V
= 2
= V
and V
LL3
LCDON
ref
×
V
is the LCD panel driving voltage required to turn on an LCD
values based on the input value of V
DD
LL3
ref
MC9S08LC60 Series Data Sheet: Technical Data, Rev. 4
is not available to power the LCD module internally, so the LCD module
(2/3) × 1.4 V
(2/3) × 1.5 V
(2/3) × 1.7 V
(2/3) × 1.8 V
V
, V
= 3
LL1
Table
LL2
LL3
= V
×
Table 9-20
V
Voltage Doubler
ref
is also generated internally when the charge pump is enabled
and V
LCDCPMS = 0
9-18). When powering the LCD module using V
ref
Table 9-19. V
LL1
LL1,
is tripled and outputted as V
LCDON
LL1.
V
DD
LL2,
V
provides recommendations regarding configuration of the
V
LL3
LL3
is used as the LCD module power supply when
LL1
NOTE
LL1
are equivalent, V
LL3
2.8 V
3.0 V
3.3 V
3.6 V
and V
= 3 × V
should be approximately 5-V.
is connected to the internal charge pump via the V
Typical Values
will be equal to 3*V
LL3
ref
LCDON.
when the charge pump is disabled. If the
LCD
.
For 3-V LCD glass, V
V
LL3
LL1,
LL1
1.67 V
1.4 V
1.5 V
1.8 V
LL3.
= V
should be
Operation).
V
LL2,
ref
Voltage Tripler
LCDCPMS = 1
LCD
V
LL3
or V
or 3*(2/3*V
, a LCD bias voltage, is
LCD
LL3
Table 9-19
V
Freescale Semiconductor
DD
LL3
will be configured
.
, the charge pump
4.2 V
4.5 V
5.0 V
5.4 V
= 3 × V
LL3
LCD
should be
ref
shows the
) (see
ref.