Analog Devices Blackfin Landscape LCD EZExtender Manual Rev 11

							Blackfin Landscape LCD EZ-Extender Manual xi Preface
 Capacitive touch controller:
 Analog Devices AD7147 capacitive touch controller
 Four push buttons and one scroll wheel
 1.8V to 3.3V I/O operation
 No power supply required: derives power from the EZ-KIT 
Lite/EZ-Board 
 CE certified
 Dimensions: 3.75 in. (height) x 3.5 in. (width)
Before using any of the interfaces, follow the setup procedure in “Land-
scape LCD EZ-Extender Setup” on page 1-2.
Example programs are available to demonstrate capabilities of the Blackfin 
Landscape LCD EZ-Extender board.
Purpose of This Manual
The Blackfin Landscape LCD EZ-Extender Manual describes operation and 
configuration of the extender board’s components. A schematic and a bill 
of materials are provided as a reference for future Blackfin processor board 
designs.
Intended Audience
This manual is a user’s guide and reference to the Blackfin Landscape 
LCD EZ-Extender. Programmers who are familiar with the Analog 
Devices Blackfin processor architecture, operation, and development tools 
are the primary audience for this manual.  
						

							Manual Contents
xii Blackfin Landscape LCD EZ-Extender ManualProgrammers who are unfamiliar with Analog Devices processors can use 
this manual but should supplement it with other texts that describe your 
target architecture. For the locations of these documents, see “Related 
Documents”.
Programmers who are unfamiliar with CCES or VisualDSP++ should refer 
to the online help and user’s manuals. 
Manual Contents
The manual consists of:
 Chapter 1, “Landscape LCD EZ-Extender Interfaces” on page 1-1, 
provides basic board information.
 Chapter 2,  “Landscape LCD EZ-Extender Hardware Reference” 
on page 2-1, provides information on the hardware aspects of the 
board.
 Appendix A, “Landscape LCD EZ-Extender Bill of Materials” on 
page A-1, provides a list of components used to manufacture the 
EZ-Extender board.
 Appendix B, “Landscape LCD EZ-Extender Schematic” on 
page B-1, provides the resources to allow EZ-Board or EZ-KIT 
Lite board-level debugging or to use as a reference design. Appen-
dix B is part of the online help. 
						

							Blackfin Landscape LCD EZ-Extender Manual xiii Preface
What’s New in This Manual
This is revision 1.1 of the Blackfin Landscape LCD EZ-Extender Manual. 
The manual has been updated to include CCES information. In addition, 
modifications and corrections based on errata reports against the previous 
manual revision have been made.
For the latest version of this manual, please refer to the Analog Devices 
Web site.
Technical Support
You can reach Analog Devices processors and DSP technical support in 
the following ways:
 Post your questions in the processors and DSP support community 
at EngineerZone
®:
http://ez.analog.com/community/dsp
 Submit your questions to technical support directly at:
http://www.analog.com/support
 E-mail your questions about processors, DSPs, and tools develop-
ment software from CrossCore Embedded Studio or 
VisualDSP++:
Choose Help > Email Support. This creates an e-mail to
[email protected] and automatically attaches 
your CrossCore Embedded Studio or VisualDSP++ version infor-
mation and 
license.dat file.
 E-mail your questions about processors and processor applications 
to: 
[email protected] or
[email protected] (Greater China support) 
						

							Supported Products
xiv Blackfin Landscape LCD EZ-Extender ManualUSA only, call 1-800-ANALOGD (1-800-262-5643)
 Contact your Analog Devices sales office or authorized distributor. 
Locate one at:
www.analog.com/adi-sales
 Send questions by mail to:
Processors and DSP Technical Support
Analog Devices, Inc.
Three Technology Way
P.O. Box 9106
Norwood, MA 02062-9106
USA
Supported Products
The Blackfin Landscape LCD EZ-Extender is a daughter board for the 
ADSP-BF526, ADSP-BF537, ADSP-BF538, and ADSP-BF548 processor 
evaluation systems.
Product Information
Product information can be obtained from the Analog Devices Web site 
and the online help.
Analog Devices Web Site
The Analog Devices Web site, www.analog.com, provides information 
about a broad range of products—analog integrated circuits, amplifiers, 
converters, and digital signal processors.
To access a complete technical library for each processor family, go to 
http://www.analog.com/processors/technical_library. The manuals  
						

							Blackfin Landscape LCD EZ-Extender Manual   xv Preface
selection opens a list of current manuals related to the product as well as a 
link to the previous revisions of the manuals. When locating your manual 
title, note a possible errata check mark next to the title that leads to the 
current correction report against the manual. 
Also note, 
MyAnalog is a free feature of the Analog Devices Web site that 
allows customization of a Web page to display only the latest information 
about products you are interested in. You can choose to receive weekly 
e-mail notifications containing updates to the Web pages that meet your 
interests, including documentation errata against all manuals. 
MyAnalog 
provides access to books, application notes, data sheets, code examples, 
and more.
Visit 
MyAnalog to sign up. If you are a registered user, just log on. Your 
user name is your e-mail address.
EngineerZone
EngineerZone is a technical support forum from Analog Devices. It allows 
you direct access to ADI technical support engineers. You can search 
FAQs and technical information to get quick answers to your embedded 
processing and DSP design questions.
Use EngineerZone to connect with other DSP developers who face similar 
design challenges. You can also use this open forum to share knowledge 
and collaborate with the ADI support team and your peers. Visit 
http://ez.analog.com to sign up.  
						

							Related Documents
  xvi Blackfin Landscape LCD EZ-Extender Manual
Related Documents
For additional information about the product, refer to the following 
publications.
Table 1. Related Processor Publications
Title Description
ADSP-BF522/ADSP-BF523/ADSP-BF524/ 
ADSP-BF525/ADSP-BF526/ADSP-BF527 
Blackfin Embedded Processor Data Sheet
ADSP-BF534/ADSP-BF536/ADSP-BF537 
Blackfin Embedded Processor Data Sheet
ADSP-BF538/ADSP-BF538F Blackfin 
Embedded Processor Data Sheet
ADSP-BF542/ADSP-BF544/ADSP-BF547/ 
ADSP-BF548/ADSP-BF549 Blackfin 
Embedded Processor Data SheetGeneral functional description, pinout, and 
timing of the processor
ADSP-BF52x Blackfin Processor Hardware 
Reference
ADSP-BF537 Blackfin Processor Hardware 
Reference
ADSP-BF538/ADSP-BF538F Blackfin 
Processor Hardware Reference
ADSP-BF54x Blackfin Processor Hardware 
ReferenceDescription of the internal processor architec-
ture and all register functions
Blackfin Processor Programming ReferenceDescription of all allowed processor assembly 
instructions 
						

							Blackfin Landscape LCD EZ-Extender Manual 1-1 
1 LANDSCAPE LCD 
EZ-EXTENDER INTERFACES
This chapter provides the setup procedure for the Blackfin Landscape 
LCD EZ-Extender and EZ-KIT Lite/EZ-Board (ADSP-BF526, 
ADSP-BF537, ADSP-BF538, or ADSP-BF548) and describes all inter-
faces the extender supports. 
The information is presented in the following order.
“Landscape LCD EZ-Extender Setup” on page 1-2
“LCD Display” on page 1-3
“LCD Touch Controller (AD7879)” on page 1-4
“Capacitive Touch Controller (AD7147)” on page 1-4
“Serial ROM” on page 1-5
“Example Programs” on page 1-6 
						

							Landscape LCD EZ-Extender Setup
1-2 Blackfin Landscape LCD EZ-Extender Manual
Landscape LCD EZ-Extender Setup
It is very important to set up all components of the system containing the 
Blackfin Landscape LCD EZ-Extender, then apply power to the system. 
The following procedure is recommended for the correct setup. 
1. Read the applicable design interface section in this chapter—the 
text provides an overview of the interface capabilities.
2. Read “System Architecture” on page 2-2 to understand the physical 
connections of the extender board. For detailed information, refer 
to “Landscape LCD EZ-Extender Schematic” on page B-1.
3. Set the jumpers on the extender board. Use the block diagram in 
Figure 2-1 on page 2-2 in conjunction with “Jumper Settings” on 
page 2-3.
4. Set the switches and jumpers on the EZ-KIT Lite/EZ-Board. If not 
already, familiarize yourself with the board documentation and 
schematic drawings (see “Product Information”). 
Compare the parallel peripheral interface (PPI) or expansion inter-
face II connector signals of the extender board with the EZ-KIT 
Lite/EZ-Board signals to ensure there is no contention. For exam-
ple, it may be necessary to disable other devices connected to the 
PPI or expansion II connector of the processor or disable the push 
buttons on the EZ-KIT Lite/EZ-Board.
5. Install the extender on the EZ-KIT Lite/EZ-Board via the PPI or 
expansion II connector.
6. Configure any other interfacing boards; for example, another 
EZ-Extender board. 
7. Power your system. 
						

							Blackfin Landscape LCD EZ-Extender Manual 1-3 Landscape LCD EZ-Extender Interfaces
LCD Display
The Blackfin Landscape LCD EZ-Extender is shipped with a 3.5 in. land-
scape, QVGA (320 x RGB x 240) display with an LCD backlight. All 
LCD data, touchscreen pins, and power pins connect to the display via a 
single connector (
P1). The 18-bit display operates in 16-bit mode 
(RGB 5-6-5) and connects to the PPI [15–0] data pins of the processor. 
The display also uses the serial peripheral interconnect (SPI) port of the 
processor for control register setup. The LCD display can operate at a 
VDDIO of 1.6V to 3.6V. This allows you to connect the LCD display to 
the PPI/SPI interface of the processor gluelessly, without the need for 
voltage translation circuitry— a great benefit for power-sensitive 
applications.
The PPI clock of a Blackfin processor and the clock required by the LCD 
display are driven by the on-board 5 MHz oscillator. By default, the oscil-
lator is enabled and drives the PPI interface. You can use the clock 
generated by the processor or can disable the 5 MHz oscillator by setting 
the appropriate jumpers on the extender. See “Jumper Settings” on 
page 2-3 for more information.
At power-up, the LCD backlight circuit is disabled. By default, the shut 
pin of the LCD display turns the display 
OFF. Write to the respective con-
trol registers to enable the backlight and take the display out of the shut 
mode. These settings provide significant power savings and are suited for 
power-sensitive applications.
For more information about the LCD display, go to the Sharp Web site. 
An example program demonstrating capabilities of the LCD display is 
available in the 
Examples folder of the installation directory. 
						

							LCD Touch Controller (AD7879)
1-4 Blackfin Landscape LCD EZ-Extender Manual
LCD Touch Controller (AD7879)
The Blackfin Landscape LCD EZ-Extender is shipped with a low-cost 
resistive touch controller (Analog Devices AD7879). The four pins gener-
ated by activating the LCD display (X+, X-, Y+, Y-) connect to a single 
connector (
P1), controlled via the LCD display. You can access the con-
troller via the SPI interface of the Blackfin processor. The controller 
generates an interrupt request for the processor whenever any new data is 
available or when a user touches the LCD Display. The processor uses the 
SPI interface to read the appropriate registers of the AD7879 controller. 
The IRQ line connects the AD7879 controller to the processor via the 
processor’s general-purpose I/O (GPIO) pin. By default, the AD7879 
controller uses the SPI select 1 and 
GPIO1 pins. “Jumper Settings” on 
page 2-3 describe how the GPIO and SPI selects can be varied for differ-
ent EZ-KIT Lites and EZ-Boards. 
For more information about the AD7879 touch controller, go to 
www.analog.com and search for AD7879.
An example program demonstrating capabilities of the touch controller is 
available in the 
Examples folder of the installation directory.
Capacitive Touch Controller (AD7147)
The Landscape LCD EZ-Extender is equipped with a CapTouch™ pro-
grammable controller (Analog Devices AD7147) for applications 
implementing push buttons and scroll wheels. The four push button sen-
sors and one scroll wheel are located on the top side of the extender’s 
printed circuit board (PCB). 
When the respective sensor is activated, the captouch controller recognizes 
and communicates the change to the Blackfin processor via the processor’s 
2-wire interface (TWI). The AD7147 controller generates an interrupt 
request for the Blackfin processor whenever any new data is available or