Analog Devices Blackfin Landscape LCD EZExtender Manual Rev 11

Blackfin Landscape LCD EZ-Extender Manual 1-5 Landscape LCD EZ-Extender Interfaces
when a user touches the push buttons (
PB1—4) or scroll wheel. The push 
buttons and scroll wheel are copper pads created inside the PCB. Touch 
the respective push button or traverse around the scroll wheel with a fin-
ger to enable the sensor pads and to generate the interrupt request. The 
IRQ line connects the AD7147 controller to the processor via its GPIO 
pin. By default, the AD7147 controller uses the SPI select 2...

Example Programs
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Example Programs
Example programs are provided with the Landscape LCD EZ-Extender 
EZ-KIT Lite to demonstrate various capabilities of the product. The pro-
grams are included in the product installation kit and can be found in the 
Examples folder of the installation. Refer to a readme file provided with 
each example for more information.
CCES users are encouraged to use the example browser to find examples 
included with the EZ-KIT Lite...

Blackfin Landscape LCD EZ-Extender Manual 2-1 
2 LANDSCAPE LCD 
EZ-EXTENDER HARDWARE 
REFERENCE
This chapter describes the hardware design of the Blackfin Landscape 
LCD EZ-Extender. 
The following topics are covered.
“System Architecture” on page 2-2
Describes the board configuration and explains how the board 
components interface with the processor and EZ-KIT 
Lite/EZ-Board.
“Jumper Settings” on page 2-3
Describes the on-board configuration jumpers.
“Connectors” on page 2-12
Describes the connectors...

System Architecture
2-2 Blackfin Landscape LCD EZ-Extender Manual
System Architecture
A block diagram of the Blackfin Landscape LCD EZ-Extender is shown in 
Figure 2-1.
Figure 2-1. Block Diagram
SPI
UNREG
POWER
FLAGs
(2)
HSYNC
VSYNC
PPI16 bit PPI
(5-6-5)
FS1,FS2
DATA
BACKLIGHT
PWR
LOGIC
PWR
AD7879TOUCH
BACK
LIGHTVDD
VDDIO
PENIRQ
5 MHz 
OscillatorCLK
Blackfin Landscape 
LCD EZ-Extender
CS0,SCK,MISO,MOSI
DEN
TWIAD7147-1
Scroll
Wheel
(Cap Touch 
Sensors)VDDIO
SPI
M24C02 

Blackfin Landscape LCD EZ-Extender Manual 2-3  Landscape LCD EZ-Extender Hardware Reference
Jumper Settings
Before using the Blackfin Landscape LCD EZ-Extender, follow the setup 
procedure in “Landscape LCD EZ-Extender Setup” on page 1-2.
Figure 2-2 shows the locations of all jumper headers. A two-pin jumper 
can be placed on the respective jumper header for different functionality. 
The following sections describe all possible jumper settings and associated 
functionality.
Figure 2-2. Jumper Locations 

Jumper Settings
2-4 Blackfin Landscape LCD EZ-Extender Manual
AD7147 ADDR0 Jumper (JP1)
The AD7147 ADDR0 jumper (JP1) changes the least significant address bit 
used to communicate to the AD7147 touch controller via the TWI inter-
face of the processor. By default, 
JP1 requires no jumpers. When no 
jumper is installed, the 
ADDR0 bit is pulled low and is a logic ‘0’ 
(seeTable 2-1).
LCD SPI Chip Select Jumper (JP2)
The LCD SPICS jumper (JP2) connects the chip select pin of the serial 
peripheral...

Blackfin Landscape LCD EZ-Extender Manual 2-5  Landscape LCD EZ-Extender Hardware Reference
LCD Touch SPI Chip Select Jumper (JP3)
The LCD touch SPICS jumper (JP3) connects the chip select pin of the 
AD7879 SPI interface (
U1) to one of three SPI select pins of the Blackfin 
processor. 
JP3 adds flexibility to the extender: you can choose any one of 
the available SPI select pins (
SPISEL1—3) of the processor (seeTable 2-3). 
By default, 
JP3 is populated, so that SPISEL2 of the expansion interface II...

Jumper Settings
2-6 Blackfin Landscape LCD EZ-Extender Manual
JP5 adds flexibility to the extender: you can control the LCD display reset 
by one of three available methods. By default, 
JP5 is populated so that the 
EZ-KIT Lite/EZ-Board reset pin connects to the reset pin of the LCD dis-
play (
P1.28). Consequently, a reset supervisory circuit located on the 
EZ-KIT Lite/EZ-Board controls the reset pin going to the LCD display 
(see Table 2-4). 
To control the LCD display reset via software, write to...

Blackfin Landscape LCD EZ-Extender Manual 2-7  Landscape LCD EZ-Extender Hardware Reference
AD7147 ADDR1 Jumper (JP7)
The AD7147 ADDR1 jumper (JP7) changes the second least significant 
address bit used to interface to the AD7147 capacitive touch controller via 
the TWI interface of the Blackfin processor. By default, 
JP7 requires no 
jumpers. When no jumper is installed, the 
ADDR1 bit is pulled low and is a 
logic ‘
0’ (see Table 2-6).
Serial ROM Addr Jumper (JP8)
The serial ROM address jumper (JP8)...

Jumper Settings
2-8 Blackfin Landscape LCD EZ-Extender Manual
Serial ROM Write Protect Jumper (JP9)
The serial ROM write protect jumper (JP9) protects the entire contents of 
the memory device (M24C02) from inadvertent write operations. By 
default, 
JP9 has a jumper installed, making the memory a read-only 
device. The default setting ensures that any hardware or software revision 
information stored in the ROM is preserved. Remove 
JP9 when you need 
to write to serial ROM (see Table 2-8). Table 2-7....