OM6290 NXP Semiconductors, OM6290 Datasheet - Page 22
![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
9.7 Set bias system
The bias voltage levels are set in the ratio of R − R − n × R − R − R (see
Different multiplex rates require different bias settings. Bias settings are programmed by
BS[2:0], which sets the binary number n. The optimum value for n is given by:
Supported values of n are given in
Table 8.
n
BS[2:0]
000
001
010
011
100
101
110
111
Fig 11. Voltage divider chain
=
muxrate 3
Programming the required bias system
–
All information provided in this document is subject to legal disclaimers.
n
7
6
5
4
3
2
1
0
Rev. 05 — 10 August 2010
Table
R
R
n × R
R
R
Bias system
1
1
1
1
1
1
1
1
⁄
⁄
⁄
⁄
⁄
⁄
⁄
⁄
11
10
9
8
7
6
5
4
8.
Table 9
V
V
V
V
V
V
013aaa183
1
2
3
4
5
6
= V
= V
shows the intermediate bias voltages.
LCD
SS
Comment
-
-
-
-
recommended for 1:34
recommended for 1:26
recommended for 1:17
recommended for icon mode
34 x 128 pixel matrix driver
PCF8531
© NXP B.V. 2010. All rights reserved.
Figure
11).
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