OM6290 NXP Semiconductors, OM6290 Datasheet - Page 12
![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
Table 6.
PCF2119X
Product data sheet
Multiplex
rate
1:18
1:9
1:2
Bias levels as a function of multiplex rate
Number of
bias levels
5
5
4
8.5.1 Electro-optical performance
The RMS on-state voltage (V
RMS off-state voltage (V
where the values of a are
and the values for n are
Discrimination (D) is the ratio of V
Suitable values for V
RMS voltage, at which a pixel will be switched on or off, determine the transmissibility of
the pixel.
For any given liquid, there are two threshold values defined. One point is at 10 % relative
transmission (at V
For a good contrast performance, the following rules should be followed:
V
V
D
V
V
on RMS
off RMS
on RMS
off RMS
a = 2 for
a = 3 for
n = 2 for 1:2 multiplex rate
n = 9 for 1:9 multiples rate
n = 18 for 1:18 multiplex rate.
=
(
(
(
(
---------------------- -
V
Bias voltages
V
V
V
V
V
1
LCD
LCD
LCD
off RMS
on RMS
)
)
)
)
(
≥
(
≤
=
=
1
1
V
V
⁄
⁄
V
V
4
5
high
V
low
3
-- - V
4
3
-- - V
4
2
-- - V
3
LCD
LCD
)
)
bias
bias
2
(
(
(
=
All information provided in this document is subject to legal disclaimers.
LCD
LCD
LCD
----------------------------- -
n
----------------------------- -
n
a
a
low
2
×
×
2
(
------------------------------------------- -
(
–
–
–
+
a
a 1
–
(
) and the other at 90 % relative transmission (at V
on(RMS)
(
1
V
V
V
1
2a
+
2a
–
SS
SS
SS
+
+
Rev. 9 — 14 April 2011
1
off(RMS)
)
)
)
+
+
a
)
a
)
2
2
)
n
)
n
2
2
+
+
and V
on(RMS)
(
(
V
n 1
n 1
1
-- - V
2
1
-- - V
2
2
-- - V
3
) with
3
(
(
(
–
–
on(RMS)
LCD
LCD
LCD
off(RMS)
)
)
) for the LCD is calculated with
Equation
–
–
–
V
V
V
SS
SS
SS
to V
are dependant on the LCD liquid used. The
)
)
)
off(RMS)
4:
V
1
-- - V
2
1
-- - V
2
1
-- - V
3
4
(
(
(
LCD
LCD
LCD
and is determined from
–
–
–
V
V
V
SS
SS
SS
)
)
)
LCD controllers/drivers
V
1
-- - V
4
1
-- - V
4
1
-- - V
3
Equation 3
5
(
(
(
PCF2119x
LCD
LCD
LCD
high
© NXP B.V. 2011. All rights reserved.
–
–
–
), see
V
V
V
SS
SS
SS
Equation 5
)
)
)
and the
Figure
12 of 83
V
V
V
V
6
SS
SS
SS
(3)
(4)
(5)
(6)
(7)
3.