PCF8811U/2DA/1 NXP [NXP Semiconductors], PCF8811U/2DA/1 Datasheet - Page 54

• Manufacturer Part Number: PCF8811U/2DA/1
• Description: 80 x 128 pixels matrix LCD driver
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCF8811_4
Product data sheet
Fig 36. V
V
V
LCD
OP
LCD
12.10.2 Extended command set
[7:0] programming, (00h to FFh).
12.11 Temperature control
programming of the PCF8811
00
a
01
b
The V
V
pads V
Instead of using the V
maker calibration setting MMVOPCAL[4:0]; see
Where:
As the programming range for the internally generated V
maximum allowed V
selecting the Temperature Compensation (TC), that under all conditions and including all
tolerances the V
02
Due to the temperature dependency of the liquid crystals’ viscosity, the LCD controlling
voltage V
contrast.
V
PR
•
•
•
•
•
LCD T
[7:0] is the same value as V
03
T
a is a fixed constant value; see
b is a fixed constant value; see
V
V
the OTP cells
CUT
PR
OS
LCD
OS
04
[7:0] is the programmed V
[4:0]/MMVOPCAL[4:0] is the value of the offset V
=
LCD
[4:0] to obtain the optimum optical performance.
is a reference temperature; see
T
at T = T
CUT
05
might have to be increased at lower temperatures to maintain optimum
06
=
LCD
CUT
a
. . .
+
LCD
remains below 9.0 V. This is valid for the two different command sets.
LCD
is calculated using
V
Rev. 04 — 27 June 2008
(9 V) the user has to ensure while setting the V
OS
offset pads (V
[4:0]
OP
+
[7:0]. It can additionally be adjusted with the V
V
OP
OP
Table 27
Table 27
value
[7:0]
OS
Equation
Section 12.11
[4:0]) the V
b
Section
5. In the extended command set
LCD
80 x 128 pixels matrix LCD driver
18.
LCD
can be adjusted with the module
LCD
allows values above the
. . .
pads or the value stored in
FD
FE
PCF8811
© NXP B.V. 2008. All rights reserved.
PR
FF
mgt847
register and
V
OP
LCD
54 of 81
offset
(5)