OM6290 NXP Semiconductors, OM6290 Datasheet - Page 23
![DEMO BOARD LCD GRAPHIC DRIVER](/photos/9/4/90479/om6290_sml.jpg)
OM6290
Manufacturer Part Number
OM6290
Description
DEMO BOARD LCD GRAPHIC DRIVER
Manufacturer
NXP Semiconductors
Datasheets
1.PCF8576T1118.pdf
(44 pages)
2.OM6290.pdf
(30 pages)
3.OM6290.pdf
(51 pages)
4.OM6290.pdf
(83 pages)
Specifications of OM6290
Main Purpose
Displays, LCD Controller
Embedded
Yes, MCU, 16/32-Bit
Utilized Ic / Part
PCF2119, PCF8531, PCF8576
Primary Attributes
Character, Graphic and Segment LCD Drivers
Secondary Attributes
JTAG, I²C, UART & USB Interfaces
Description/function
Demo Board
Interface Type
USB, I2C, JTAG, UART
Data Bus Width
4 bit, 8 bit, 16 bit
Operating Voltage
1.8 V to 5.5 V
For Use With/related Products
PCF8576DT, PCF2119S, PCF8531
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
568-4703
NXP Semiconductors
PCF8531
Product data sheet
9.8 LCD bias voltage
9.9 Set V
Table 9.
V
be calculated as: V
The generated voltage is dependent on the temperature, programmed Temperature
Coefficient (TC) and the programmed voltage at intersection temperature (T
V
The parameter values are given in
selected via the command HV-gen control (see
voltage which can be generated depends on the V
load current. For multiplex rate 1:34, the optimum V
Where V
The practical value for V
threshold voltage (V
As the programming range for the internally generated V
maximum allowed V
selecting the temperature compensation, that the V
exceeded under all conditions and including all tolerances.
Symbol
V1
V2
V3
V4
V5
V6
V
LCD
LCD
LCD
can be set by software. The voltage at intersection temperature [V
= V
=
LCD
th
LCD
------------------------------------- -
2
Intermediate LCD bias voltages
is the threshold voltage of the liquid crystal material used.
value
×
1
(T
⎛
⎝
+
ints
1
All information provided in this document is subject to legal disclaimers.
–
) × [1 + TC × (T − T
34
--------- -
LCD
1
th
34
LCD
), typically when the LCD exhibits approximately 10 % contrast.
Rev. 05 — 10 August 2010
⎞
⎠
(T
, the user must ensure, while setting the VOP register and
×
LCD
ints
V
th
) = a + V
is determined by equating V
=
Bias voltage
V
V
n
----------- -
n
n
----------- -
n
----------- -
n
----------- -
n
LCD
SS
+
+
+
+
2
+
1
+
5.30
3
4
2
4
4
4
Table
×
×
×
×
LCD
V
V
V
V
ints
×
LCD
LCD
LCD
LCD
V
)]
th
× b
10. Two overlapping V
Table 10
DD2
LCD
LCD
and V
limit maximum of 9.0 V is never
can be calculated as:
off(RMS)
LCD
and
Example for
V
6
5
2
1
V
DD3
34 x 128 pixel matrix driver
allows values above the
⁄
⁄
⁄
⁄
Figure
7
7
7
7
LCD
SS
× V
× V
× V
× V
LCD
with a defined LCD
voltages and the display
LCD
LCD
LCD
LCD
ranges can be
12). The maximum
PCF8531
LCD
© NXP B.V. 2010. All rights reserved.
1
⁄
7
(T = T
bias
ints
).
ints
23 of 51
)] can