NXP Semiconductors OM6290 User manual

UM10300
User Manual OM6290 LCD Demo Board
Rev.1.0 — 8 August 2008 User manual
Document information
Info Content
Keywords LCD driver, segment driver, character driver, graphic driver, PCF8576D,
PCF2119, PCF8531, PCA9633, ARM7, LPC2148, battery powered, USB
Abstract The OM6290 is a LCD driver evaluation board which can be used to
demonstrate and evaluate three different types of LCD drivers: The
PCF8576D is a segment driver, the PCF2119 a character driver and the
PCF8531 a dot matrix driver. The NXP family of LCD drivers consists of
these three different types, with several type numbers for each type.
From an application point of view, the type numbers within one type
family are very similar and also software can be easily adapted.
The board provides a starting point for applications using an NXP LCD
driver, both from the hardware and software point of view.

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev 1.0 — 8 August 2008 2 of 30
Contact information
For additional information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
Revision history
Rev Date Description
01 20080808 Initial version

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 3 of 30
1. Introduction
This User Manual describes the OM6290 LCD Demo board. This board was developed
in order to provide a tool for application engineers and development engineers wishing to
try and evaluate the possibilities of some of our LCD driver IC’s and to get hands-on
experience with writing code for these drivers. Code written using this board can be used
in the final application which enables rapid prototyping. The board can also serve as an
example for the hardware related aspects of a design using NXP LCD drivers.
Features:
Demonstrates how to use NXP LCD drivers
Contains three displays controlled by I2C LCD drivers:
•Segment display driven by segment driver PCF8576DT, TSSOP56
•Character display with character driver PCF2119S (COG, Chip On Glass)
•128 * 34 dot matrix display with graphic driver PCF8531 (COG)
PCA9633 I2C bus controlled LED driver for back light
ARM7 based NXP microcontroller LPC2148 with 512 KB flash memory
User modifiable firmware, In-System/In-Application Programming (ISP/IAP) via
UART
USB2.0 compliant interface
JTAG interface
I
2C interface
Unused pins of microcontroller available on pin strip
Power supply using 9V battery (stand alone) or via USB
Box contents:
•OM6290 LCD driver evaluation board
•USB2.0 cable
•9V battery
The three drivers all include an I2C interface and can be programmed via the onboard
NXP micro controller LPC2148 which is built around an ARM7 core.
The PCF8576D is a Segment Driver and has a lot in common with other NXP Segment
Drivers such as PCF8532 (4 x 160 segments), PCF8533 (4 x 80), PCF8534A (4 x 60),
PCF8562 (4 x 32) and PCF8566 (4 x 24).
The PCF2119 is a Character Driver and has a lot in common with other members of the
family like PCF2113 and PCF2116.
The PCF8531 is a Graphic Driver (Row/Column) and the NXP family of Graphic Drivers
contains some other types like PCF8535. Experiences gained with the onboard drivers
can easily be used for working with the other drivers belonging to the same family.
The 12nc of the OM6290 board is 9352 861 74598.

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 4 of 30
2. Board description and layout
Below the top view of the board is given. LCD3 is the large display on the left. For this
display a backlight is used which is controlled by the PCA9633 LED driver. On the top
right LCD2 is present and the smaller display below LCD2 is LCD1.
Fig 1. Top view of LCD Demoboard

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 5 of 30
For best optical performance, remove the protective foils from the three displays. In order
for the board to work standalone, jumpers J1 and J2 (I2C) must be placed as well as
jumper J4. Default position for J4 is ‘Enabled’, enabling LED driver PCA9633 (IC5).
2.1 Switches
Three switches are present next to the large display LCD3. SW1 is used to select the
predefined patterns/text present in the firmware for display on LCD1. SW2 has the same
function but then for LCD2 and SW3 selects the pattern that will be displayed on LCD3.
Furthermore SW3 can be used to select some lighting modes of backlight BL1 which is
mounted under LCD3.
SW4 is located near the bottom of the board and is the reset switch. At start up all
displays will display some text and when SW1 or SW2 or SW3 is pressed, the displayed
text/pattern on the related display will change.
Switch S1 can be used to select “Program Internal Flash” of the LPC2148 in order to
program modified firmware, or to let the LPC2148 boot from its internal flash.
The OM6290 is a USB-powered device. Alternatively the board can be powered using a
standard 9V (6LR61 / PP3) battery. A battery holder is present on the board and switch
S2, located between the battery holder and LCD3, can be used to select either USB-
power or battery power.
2.2 LED indicators
The board contains two LED indicators. LED D7 (green) indicates that +5V is present on
the board, supplied either via USB or via the +9V battery. The +3V3 is derived from +5V.
LED D4 (orange/red, labeled LINK) is on when firmware has been loaded into the flash
memory. If S1 is in position “Program Flash” and the board is reset, D4 goes off and the
board is ready to be flashed. After programming the board, move S1 to “Boot from Flash”
and reset the board by pressing SW4 “RESET”. D4 will turn on now.
2.3 Jumpers
The board contains five jumpers.
•J1 (SDA) and J2 (SCL), positioned just below the micro controller, allow
disconnecting the I2C bus on the board from the LPC2148 I2C interface. When
jumpers J1 and J2 are lifted, the I2C connections to the micro controller are
disconnected and the display drivers can be programmed via any other micro
controller or application with I2C-interface. The I2C signals SDA and SCL as well as
GND and 3V3 and 5V are available on the pin strip P3 just above the 9V battery.
•J3, near the bottom of the board, can usually be left open. If present it allows
resetting the microcontroller via serial interface RS1, required for ISP programming.
•J4 is used to enable/disable the outputs of the PCA9633 LED driver which is used for
backlight BL1. Default position is enabled. If it is put in position ‘uCONTR’ it is
possible to use the firmware to disable and enable the outputs.
•J5 is used to enable the JTAG interface. In this case also connector P4 must be
mounted on the board. This would be useful to explore the LPC2148 more indepth.

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 6 of 30
2.4 Connectors
On the left below LCD3 a pin strip P3 is available which carries the following signals: 5V,
3V3, SCL, GND, SDA and nRES. The latter is connected to the reset circuit IC6 and by
making nRES LOW, a defined reset signal is generated.
On the right side of the board a USB connector has been provided. At the time of writing
the first revision of this manual the only purpose of the USB connector is to offer the
option of powering the board via USB. Future updates of the firmware which would also
enable data communication between the LCD driver ICs and a GUI which then would run
on a PC, are under consideration.
The serial interface RS1 (UART) below the USB connector is used for updating the
firmware in the microcontroller.
2.5 Reserved components
The board layout includes a few components which are not directly necessary for the
primary purpose of the board which is providing a hands-on tool to work with the three
different types of NXP LCD drivers. Therefore these components are not mounted.
However, in some scenario’s it may be desired to explore more of the options of the on-
board microcontroller. Therefore three optional areas may be mounted by the user of the
board in order to add extra functionality.
1. Real Time Clock of LPC2148: By mounting a 32.768 kHz crystal at position Y2 as
well as two capacitors at positions C29, C30 the internal RTC can be used. The
values of C29 and C30 depend on the crystal used. A crystal for an RTC is designed
to operate with a certain load capacitance CL. A common value for the required load
capacitance of such a crystal is 12.5 pF. Seen from the crystal C29 and C30 are in
series. Taking into account parasitic capacitances as well, C29 and C30 will have to
be 22 pF or 25 pF if a 12.5 pF crystal is used.
2. JTAG interface: On the right side of the board under LCD1, space is provided for a
JTAG connector. This is a 20-pin header with pitch of 2.54 mm. The required pull-up
resistors are already mounted.
3. Pin strips P1 and P2 near the bottom edge of the board. If a pin strip is soldered on
the board at this position, all unused pins of the microcontroller are accessible.
If mounted, exercise caution not to overload these signal lines !
Besides these microcontroller related items, another option is to remove resistor R29
(470 Ω) and mount potentiometer Pot1 (4k7) instead. This enables adjustment of the
contrast of display LCD3. The location of these components is between LCD2 and LCD3.

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 7 of 30
2.6 Hardware requirements
In order to be able to modify the firmware of the OM6290 Demo Board you need:
•The OM6290 Demo Board
•An IBM-compatible PC with an unused USB port to supply power to the board
(alternatively via a battery) and an unused RS232 COM port for Flash In-System
Programming (ISP) via the Serial Interface.
•70 Megabytes free hard disk space (depending on the IDE used)
•128 Megabytes of RAM
•A serial cable, 9-pin male to 9-pin female, no longer than 10ft/3m, wired one-to-one,
in order to program new firmware on the OM6290 board, using the FlashMagic tool,
see below.
2.7 Software requirements
In order to be able to modify or write code the following software is required:
•Windows Operating System (Windows 2000, Windows XP or Windows Vista);
•A development tool for ARM7 cores providing source code editing, compiling, linking
and debugging. A good (free) option is the evaluation version of the Keil
Microcontroller Development Kit (MDK-ARM). At the time of writing the latest is
mdk322a, which is Version 3.22 (or use later versions as they become available).
This can be downloaded at https://www.keil.com/demo/eval/arm.htm (registration
required). The RealView MDK includes μVision (Integrated Development
Environment, Debugger and Simulator) and RealView compilation tools for C/C++
and linker. For more information see http://www.keil.com/arm;
•Programming utility FlashMagic to flash the .hex file into the LPC2148, see
http://www.flashmagictool.com/. This is freeware.
For more information about how to use these tools refer to chapter 5.
2.8 Modes of operation
The board can be used in two different modes:
1. stand-alone mode; after power-up pre-defined patterns/texts are displayed on the
three displays. Using switches SW1, SW2 and SW3 it is possible to select various
patterns. The firmware can be modified using the appropriate tools;
2. I2C remote mode; jumpers on the board (J1 and J2) can be removed such that the
on-board microcontroller’s I2C bus is no longer connected to the display drivers. Via
pin strip P3 all display drivers can be accessed directly from an external I2C-bus.
This allows to access the display drivers on the board from any other application via
I2C using a microcontroller residing on a separate board.
Note: the following describes the operation of the version 1 software. Please refer to the
Quick Start Guide that corresponds to your version of software for operating details.
When the board is used in stand-alone mode (Software version 1.10) it behaves as
follows. After power on, LCD3 is dark, the back light is off. LCD2 shows a welcome
message and after a few seconds shows the message “Please press SW1, 2 or 3”. With
early versions LCD1 shows the NXP logo at startup. Starting from firmware version v1.1

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 8 of 30
LCD1 shows three lines of text, with in the right bottom corner the version number. Upon
pressing any of the switches SW1, SW2 or SW3 the backlight of LCD3 turns on.
LCD1.
Power on: The NXP logo is displayed. Starting from v1.1, the following text is displayed
over three lines,:
“NXP founded by Philips”
“For the latest updates”
“visit www.nxp.com”
When pressing SW1 the displayed pattern changes to the NXP logo and subsequent
operation of SW1 results in alternating between the NXP logo, displaying the type
number of the driver (PCF8531) and displaying a face.
LCD2.
At power on the message “ * welcome * ” enters the upper line, shifting from right to left.
This shows the ‘display shift’ feature. After that the message “Please press SW1, 2 or 3”
appears. When SW2 is pressed, the display shows “NXP Insightful”. Pressing once more
results in “NXP Inventive”. Consecutive pressing of SW2 results in cycling through texts
“NXP Engaging”, “NXP Excellence”, “USE SW3 FOR BACKLIGHT” and
“NXP PCF2119s”. Hereafter the cycle starts again.
When the message “USE SW3 FOR BACKLIGHT” is displayed, SW3 does not control
what is being displayed on LCD3, but instead changes the backlight colour and/or
intensity when pressed. Also note that only when this message is displayed, a cursor is
seen blinking on the right of the message. This demonstrates the feature ‘cursor blink’ of
the PCF2119.
LCD3.
Power on: The display is blank, then after a few seconds the counter read “000”.
Pressing SW1 – SW3 increments the count. Pressing SW3 once results in the text “CH”
being displayed. Operating SW3 a 2nd time results in all segments being lit up. When now
SW3 is pressed a 3rd time, it restarts the cycle with a blank display again.
3. The LCD Drivers
The board contains three different types of LCD drivers. This chapter describes the used
drivers on the board. The key values of NXP LCD drivers are listed below.
Segment drivers:
•High segment count, leading in number of segments supported per
single device; 60 x 4, 80 x 4, 160 x 4;
•AEC-Q100 automotive qualification.
Character drivers:
•Separate icon row for versatile usage.
Graphic drivers (dot matrix):

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 9 of 30
•Resolutions that are not common in the market:
34 x 128, 65 x 133, 80 x 128.
3.1 Segment Driver PCF8576D
3.1.1 General Description
The PCF8576D is a peripheral device which interfaces to almost any Liquid Crystal
Display (LCD) with low multiplex rates. It generates the drive signals for any static or
multiplexed LCD containing up to four backplanes and up to 40 segments. It can be
easily cascaded for larger LCD applications. The PCF8576D is compatible with most
microprocessors / microcontrollers and communicates via a two-line bidirectional I2C-
bus. Communication overheads are minimized by a display RAM with auto-incremented
addressing, by hardware sub-addressing and by display memory switching (static and
duplex drive modes). It has a lot in common with other NXP Segment Drivers such as
PCF8532 (4 x 160 segments), PCF8533 (4 x 80 segments), PCF8534A (4 x 60),
PCF8562 (4 x 32) and PCF8566 (4 x 24).
3.1.2 Features
single chip LCD controller / driver
selectable backplane drive configuration: static or 2 / 3 / 4 backplane multiplexing
selectable display bias configuration: static, 1/2 or 1/3
internal LCD bias generation with voltage-follower buffers
40 segment drives:
•up to twenty 8-segment numeric characters
•up to ten 15-segment alphanumeric characters
•any graphics of up to 160 elements
40 x 4-bit RAM for display data storage
auto-incremented display data loading across device subaddress boundaries
display memory bank switching in static and duplex drive modes
versatile blinking modes
independent supplies possible for LCD and logic voltages
wide power supply range: from 1.8 to 5.5 V
wide logic LCD supply range:
from 2.5 V for low-threshold LCDs
up to 6.5 V for guest-host LCDs and high-threshold (automobile) TN LCDs
low power consumption
400 kHz I2C-bus interface
compatible with 4, 8 or 16-bit microprocessors or microcontrollers
may be cascaded for large LCD applications (up to 2560 elements possible)
no external components
compatible with chip-on-glass and chip-on-board technology

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 10 of 30
manufactured in silicon gate CMOS process
AEC-Q100 compliant (TQFP64).
3.1.3 Block diagram
001aab131
LCD
VOLTAGE
SELECTOR
CLOCK SELECT
AND TIMING BLINKER
TIMEBASE
OSCILLATOR
INPUT
FILTERS I
2
C-BUS
CONTROLLER
POWER-ON
RESET
CLK
SYNC
OSC
SCL
SDA
SA0
BACKPLANE
OUTPUTS
DISPLAY
CONTROLLER
BP0
56
55
54
47
46
49
V
DD
48
45
44
53 50 51 52
123
BP2 BP1 BP3
DISPLAY SEGMENT OUTPUTS
DISPLAY REGISTER
OUTPUT BANK SELECT
AND BLINK CONTROL
4 to 43
S0 to S39
A0 A1 A2
PCF8576DT
LCD BIAS
GENERATOR
V
SS
V
LCD
COMMAND
DECODER WRITE DATA
CONTROL
DISPLAY
RAM
40 ×4-BIT
DATA POINTER AND
AUTO INCREMENT
SUBADDRESS
COUNTER
Fig 2. Block diagram of PCF8576D
3.2 Character Driver PCF2119
3.2.1 General Description
The PCF2119x is a low power CMOS LCD controller and driver, designed to drive a dot
matrix LCD display of 2-line by 16 or 1-line by 32 characters with 5 x 8 dot format. All
necessary functions for the display are provided in a single chip, including on-chip
temperature compensated generation of LCD bias voltages, resulting in a minimum of
external components and lower system current consumption. The PCF2119x interfaces
to most microcontrollers via a 4 or 8-bit bus or via the 2-wire I2C-bus. The chip contains a
character generator and displays alphanumeric and kana (Japanese) characters. The
letter ‘x’ in PCF2119x characterizes the built-in character set. Various character sets can
be manufactured on request. The character set of the PCF2119 on the demo board is ‘S’.
A similar device is the PCF2113 (2-line by 12 or 1-line by 24 characters + 120 icons).

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 11 of 30
3.2.2 Features
Single-chip LCD controller/driver
2-line display of up to 16 characters + 160 icons, or
1-line display of up to 32 characters + 160 icons
5 x 7 character format plus cursor; 5 x 8 for kana (Japanese) and user defined
symbols
Icon mode: reduced current consumption while displaying icons only
Icon blink function
On-chip:
•Configurable (4 times, 3 times or 2 times) voltage multiplier generating
LCD supply voltage, independent of VDD, programmable by instruction;
Using an external supply is also possible
•Programmable temperature compensation of on-chip generated VLCD;
range: −0.16 to −0.24 %/K
•Generation of intermediate LCD bias voltages
•Oscillator requires no external components but using an external clock is
also possible
Display Data RAM: 80 characters
Character Generator ROM: 240, 5 x 8 characters
Character Generator RAM: 16, 5 x 8 characters; 4 characters used to drive 160
icons, 8 characters used if icon blink feature is used in application
4 or 8-bit parallel bus and 2-wire I2C-bus interface
CMOS compatible
18 row and 80 column outputs
Three multiplex rates; 1 : 18 (for normal operation), 1 : 9 (for single line
operation) and 1 : 2 (for icon only mode)
Uses common 11 code instruction set (extended)
Logic supply voltage range, VDD1 − VSS = 1.5 to 5.5 V (chip may be driven with
two battery cells)
Display supply voltage range, VLCD − VSS = 2.2 to 6.5 V
HVgen supply voltage range, VDD2 − VSS = 2.2 to 4 V and VDD3 − VSS = 2.2 to 4 V
Direct mode to save current consumption for icon mode and Mux 1 : 9
(depending on VDD2 value and LCD liquid properties)
Very low current consumption (20 to 200 μA):
•Icon mode: <25 μA
•Power-down mode: <2 μA.

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 12 of 30
3.2.3 Block diagram
mgw571
CURSOR AND DATA CONTROL
SHIFT REGISTER 5 × 12 BIT
DATA LATCHES
COLUMN DRIVERS
80
5
80
CHARACTER
GENERATOR
RAM (128 × 5)
(CGRAM)
16 CHARACTERS
CHARACTER
GENERATOR
ROM
(CGROM)
240 CHARACTERS
DISPLAY DATA RAM
(DDRAM)
80 CHARACTERS/BYTES
ADDRESS COUNTER
(AC)
INSTRUCTION
DECODER
INSTRUCTION
REGISTER
ROW DRIVERS
SHIFT REGISTER 18-BIT
BIAS
VOLTAGE
GENERATOR
VLCD
GENERATOR
BUSY
FLAG
DATA
REGISTER
(DR)
I/O BUFFER
OSCILLATOR
TIMING
GENERATOR
DISPLAY
ADDRESS
COUNTER
V
DD1
V
LCD2
V
SS1
T1
V
LCD1
44 to 49
V
LCDSENSE
36
37 to 43
22 to 29
20
T2 21
T3 153
163
1 to 6
V
DD2
7 to 14
V
DD3
15 to 18
C1 to C80 R17DUP R1 to R18
OSC
PD
PCF2119x
DB0 to DB2
DB3/SA0
DB4 to DB7 ER/W RS SCL SDA
18
18
80
5
168
100
155
POR
154
77
7
8
77
8
8
8
160 to 162
60 to 99,
101 to 140 51 to 59, 141 to 149
164 to 167 156,
157
151,
152
15915819
V
SS2
30 to 35
Fig 3. Block diagram PCF2119x
3.3 Graphic Driver PCF8531
3.3.1 General Description
The PCF8531 is a low power CMOS LCD row/column driver, designed to drive dot matrix
graphic displays (32 rows x 128 columns) at multiplex rates of 1:17, 1:26 and 1:34.
Furthermore, it can drive up to 128 icons. All necessary functions for the display are
provided in a single chip, including on-chip generation of VLCD and the LCD bias

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 13 of 30
voltages, resulting in a minimum of external components and low power consumption.
The PCF8531 is compatible with most microcontrollers and communicates via a two-line
bidirectional bus (I2C-bus). All inputs are CMOS compatible. Similar devices are
PCF8535 (65 rows x 133 columns) and PCF8811 (80 rows x 128 columns).
Remark: The icon mode is used to reduce current consumption. When only icons are
displayed, a much lower operating voltage (VLCD) can be used and the switching
frequency of the LCD outputs is reduced. In most applications it is possible to use VDD as
VLCD.
3.3.2 Features
Single-chip LCD controller/driver
34 row and 128 column outputs
Display data RAM 34 ⋅ 128 bits
128 icons (last row is used for icons)
Fast mode I2C-bus interface (400 kbit/s)
Software selectable multiplex rates: 1:17, 1:26 and 1:34
Icon mode with Mux rate 1:2:
•Featuring reduced current consumption while displaying icons only
On-chip:
•Generation of VLCD (external supply also possible)
•Selectable linear temperature compensation
•Oscillator requires no external components (external clock also possible)
•Generation of intermediate LCD bias voltages
•Power-on reset.
No external components required
Software selectable bias configuration
Logic supply voltage range VDD1 to VSS1 is 1.8 to 5.5 V
Supply voltage range for on-chip voltage generator VDD2 and VDD3 to VSS1 to
VSS2 is 2.5 to 4.5 V
Display supply voltage range VLCD to VSS
•Normal mode 4 to 9 V
•Icon mode 3 to 9 V
Low power consumption, suitable for battery operated systems
CMOS compatible inputs
Manufactured in silicon gate CMOS process.

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 14 of 30
3.3.3 Block diagram
mgs465
DISPLAY DATA RAM
MATRIX DATA
RAM
DATA LATCHES
MATRIX
LATCHES
COLUMN
DRIVERS
C0 to C127
PCF8531
R0 to R33
ROW
DRIVERS
COMMAND
DECODER ADDRESS COUNTER
DISPLAY
ADDRESS
COUNTER
TIMING
GENERATOR
OSCILLATOR
INTERNAL
RESET
POWER-ON RESET ENR
RES
OSC
I
2C-BUS
CONTROL
INPUT
FILTERS
SA0
SCL
SDA
SDACK
VLCDOUT
VLCDSENSE
VLCDIN
T4
T3
T2
T1
34
VSS2
VSS1
VDD1 VDD2 VDD3
VLCD
GENERATOR
BIAS
VOLTAGE
GENERATOR
128
Fig 4. Block diagram PCF8531
4. The onboard microcontroller
The microcontroller chosen for this board is the LPC2148 which is a member of the NXP
ARM7 controller family. This microcontroller is based on a 16-bit/32-bit ARM7TDMI-S
CPU with real-time emulation and embedded trace support and embedded high-speed
flash memory of 512 kB. A 128-bit wide memory interface and a unique accelerator
architecture enable 32-bit code execution at the maximum clock rate. For critical code
size applications, the alternative 16-bit Thumb mode reduces code by more than 30 %
with minimal performance penalty.
The LPC2148 is highly over specified for the demo application program. This allows the
user to program the MCU with much more advanced applications. Also, it has some very
convenient features like an integrated USB interface and the possibility to program new
firmware versions in the embedded flash using In-circuit Serial Programming via the PC’s
serial port. This enables modifications in the firmware to be quickly evaluated.

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 15 of 30
Features include:
60-MHz, 32-bit ARM7TDMI-S with AHB/APB interfaces
512 KB of ISP/IAP Flash
40 KB of SRAM
Very fast Flash programming via on-chip boot loader
USB 2.0 full-speed (12 Mbps) device
Two 10-bit A/D converters, providing 14 analog inputs
10-bit D/A converter
Multiple serial interfaces: two I2C, two UARTs, one SPI, and one SSP
Two 32-bit timers
Real-time clock and Watchdog timer
45 Fast I/O pins (5-V tolerant) with up to 15-MHz switching rate
Single 3.3-V supply
LQFP64 package (10 x 10 x 1.4 mm)
5. Using µVision and FlashMagic
In order to be able to modify or write code the following software is required:
•Windows Operating System (Windows 2000, Windows XP or Windows Vista);
•A development tool for ARM7 cores providing source code editing, compiling, linking
and debugging. A good (free) option is the evaluation version of the Keil RealView
MDK-ARM Microcontroller Development Kit. At the time of writing the first release of
this manual, the latest is mdk322a, which is Version 3.22. This can be downloaded at
https://www.keil.com/demo/eval/arm.htm (registration required). The RealView MDK
includes μVision (Integrated Development Environment, Debugger and Simulator)
and RealView compilation tools for C/C++ and linker. For more information see
http://www.keil.com/arm;
•Programming utility FlashMagic to flash the .hex file into the LPC2148, see
http://www.flashmagictool.com. FlashMagic is freeware.
5.1 Keil µVision
Evaluation Software from Keil has very few limitations. Each evaluation tool set includes
the assembler, compiler, linker, debugger, and IDE. These tools allow to evaluate the
quality of the generated code, the speed and flexibility of the debugger, and the ease-of-
use provided by the µVision IDE.
Keil ARM Evaluation Kits are code size-limited and have the following restrictions:
•The Evaluation Version of the µVision IDE/Debugger may not be used to create
commercial products;
•Programs that generate more than 16K Bytes of code and data will not compile,
assemble, or link;
•The evaluation tools create Symbolic Output Format when the RealView compiler is
selected. Fully licensed tools generate standard ELF/DWARF files;
•The debugger supports programs that are 16K Bytes or smaller;

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 16 of 30
•The RealView Linker does not accept scatter-loading description files for
sophisticated memory layouts;
•The RealView Linker restricts the base address for code/constants to 0xXX000000,
0xXX800000, or 0x00080000 where XX is 00, 01, ..., FF. This allows memory start
addresses like 0x00000000 and 0x12800000;
•It is not possible to generate position independent code or data;
•The RealView C/C++ Compiler does not generate a listing file;
•The CARM compiler, assembler, and linker (only available in older versions of the
Keil MDK) are limited to 16K Bytes of object code. Source code may be of any size;
•The GNU ARM tools (compiler, assembler, and so on) that are provided are not
limited or restricted in any way.
In Fig 5 a screenshot of the KEIL IDE is shown while the current firmware was being
modified. For a full overview of available support tools (IDE) visit the NXP website.
Fig 5. Screen shot of Keil μVision3 and firmware

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 17 of 30
5.1.1 Installing μVision
An evaluation version of μVision can be downloaded from the Keil website. Registration
is required. The latest version at the time of writing the first version of this manual was
3.22. The file name is mdk322a.exe. File size is close to 100 MB. After download has
completed, double click the executable and follow the instructions.
5.1.2 Keil μVision Quick Start
The kit firmware includes all the source code for the demo that is programmed into the on
board LPC2148 when shipped. The demo project can be modified and downloaded to
the board.
Run μVision and under the menu item “Project” select “Open Project”. Edit the source
code and again, under the “Project” menu item, select “Build Target of Build All Targets”.
To download the code to the board, follow the instruction for Flash Magic in section 5.2.
To create a new project to run on the LCD Eval Board, select The IDE has to be
configured for the microcontroller used on the OM6290 board. In order to do so, select
“Project” -> “New μVision Project” and enter a project name, after which a window similar
to that indicated in Fig 6 pops up. Select LPC2148.
Fig 6. Selecting the microcontroller

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 18 of 30
As the crystal used on the board is a 12MHz crystal, the setting in the IDE has to
correspond with that. In order to achieve this, select Project -> Options for Target
‘OM6290’. The window below pops up. Set the Xtal frequency to 12 MHz.
The ARM7 CPU is capable of executing two instruction sets; the ARM instruction set
which is 32 bits wide or the Thumb instruction set which is 16 bits wide. This is a
compressed form of the ARM instruction set. Although the Thumb instructions will result
in lower code performance compared to ARM instructions, they will achieve a much
higher code density. High performance (speed) is not needed here and thus Thumb-
Mode is used. This can be selected under ‘Code Generation’, see Fig 7 below. For this,
select the tab ‘Target’.
Fig 7. Setting of some options
One restriction of the evaluation version of μVision is that the RealView Linker restricts
the base address for code/constants to 0xXX000000, 0xXX800000 or 0x00080000 where
XX is 00, 01, … , FF. This allows memory start addresses like 0x00000000 and
0x12800000.
Therefore the R/O Base needs to be set to 0 as indicated in Fig 8 for the code to
compile. Select tab ‘Linker’. This is valid if the RealView compiler is selected as
described below in 5.1.3 “Selection of the toolset”.
The meaning of R/O and R/W is as follows:

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 19 of 30
•R/O: Read Only. This is code and constants.
•R/W: Read and Write. This is data.
Fig 8. Linker options
5.1.3 Selection of the toolset
The downloaded demoboard firmware contains the file ‘OM6290 Demoboard.Uv2’ which
is the project configuration file. All settings are correct. In case settings are made
manually the information provided here is useful.
μVision uses either the ARM RealView compilation tools, the ARM ADS compiler, the
GNU GCC compiler or the Keil CARM compiler. Older versions of the Keil uVision IDE
came with the CARM compiler and the GNU GCC compiler. After Keil became an ARM
company, the CARM compiler was replaced by RealView and current downloads don’t
include the CARM compiler anymore. It is recommended to use the RealView compiler
since this is also the tool used by NXP for the development of the code for this board. In
this case downloaded software will be compatible with the tool and time consuming fixes
and adaptations are avoided.

NXP Semiconductors UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 20 of 30
The toolset to be used can be selected in the μVision IDE under Project -> Manage ->
Components, Environment, Books. This is indicated in Fig 9.
Fig 9. Selection of tool set
5.2 The FlashMagic Utility
NXP has partnered with Embedded Systems Academy to provide a free tool for flash
programming called FlashMagic. It uses a serial protocol and allows programming while
the controller is in the target hardware and supports the entire LPC2000 family (except
LPC288x).
Most important features:
•Straightforward and intuitive user interface;
•Five simple steps to erasing and programming a device and setting any options
desired;
•Programs Intel Hex Files;
•Automatic verifying after programming;
•Fills unused Flash to increase firmware security;
•Ability to automatically program checksums. Using the supplied checksum
calculation routine the firmware can easily verify the integrity of a Flash block,
ensuring no unauthorized or corrupted code can ever be executed;