OM6213 NXP Semiconductors, OM6213 Datasheet - Page 16

• Manufacturer Part Number: OM6213
• Description: Om6213 48 X 84 Pixels Matrix Lcd Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
11.8
The binary number V
can be set by the serial interface command and can be
adjusted (calibrated) by 5 input pins according to the
following formulae:
where:
To avoid numerical overflow the allowed values of V
should be limited to the range V
(decimal).
The corresponding voltage at the reference temperature,
T
Table 6 Typical values for parameters of the HV generator programming
V
V
V
Example: V
wants to decrease V
in the two’s complement notation).
If V
2001 Nov 07
a
b
T
TC
V
V
V
V
CUT
LCD(min)
LCD(max)
LCD
CUT
V
generation of the LCD supply voltage V
V
5 input pins V
V
Module Maker; see Table 7
V
command.
PR(min)
PR(max)
LCD(min)
LCD(max)
48
PR
OP
OS
CAL
PR
, can be calculated as:
SYMBOL
must never exceed 9 V.
[6:0] is set to zero, the charge pump is turned off.
is a 7-bit unsigned number set by the serial interface
is an 8-bit unsigned number used internally for
is a 5-bit two’s complement number set by the
V
is a 5-bit two’s complement number set by the
LCD
values are the values corresponding to V
values are the theoretical values corresponding to V
84 pixels matrix LCD driver
V
PR
generator
OP
V
is set to 63 (decimal) and TCB is selected. At temperature T
LCD Tcut
OS
=
[4:0]; see Table 6
V
LCD
OP
OS
representing the operating voltage
by 100 mV in order to set V
+
=
V
10.77
TCA
CAL
3.06
30.3
6.04
127
27
49
a
0
+
+
PR(min)
V
OP
2 V
to V
b
PR
LCD
PR(max)
TCB
3.84
24.3
4.81
8.74
101
0.87
27
20
PR(min)
LCD
PR
to 6.8 V. The best value for V
(1)
(2)
.
16
The generated voltage at V
temperature, programmed temperature coefficient (TC)
and the programmed voltage at the reference temperature
(T
T
Table 6. The maximum voltage that can be generated is
dependent on the voltage of V
current.
As the programming range for the internally generated
V
the user has to ensure while setting the V
and selecting the Temperature Compensation (TC),
that under all conditions and including all tolerances
the V
For a particular liquid, the optimum V
for a given multiplex rate. For a mux rate of 1 : 48, the
optimum operating voltage of the liquid can be calculated
as follows;
where V
PR(max)
CUT
LCD
CUT
V
, a and b for each temperature coefficient are given in
allows values above the maximum allowed V
LCD
).
LCD
TCC
3.62
26.1
5.18
9.35
110
0.58
27
30
V
. Under all conditions and including all tolerances
th
LCD
limit of maximum 9 V will never be exceeded.
is the threshold voltage of the liquid crystal used.
=
CUT
=
a
+
------------------------------------- V
V
the measured V
2
OP
1
+
1
OS
–
b
48
10.11
is then 4 decimal (11100 binary
----------
TCD
3.37
28.0
5.56
120
0.29
27
39
1
48
LCD
1
DD2
is dependent on the
+
TC
LCD
th
and the display load
=
LCD
Product specification
is 6.9 V. The user
6.06 V
T T
can be calculated
–
OM6213
decimal
decimal
10
PR
CUT
UNIT
th
mV
-3
V
V
V
C
register
/ C
LCD
(3)
(4)
,