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 and 
GPIO2 
pins. “Jumper Settings” on page 2-3 describe how the GPIO and SPI 
selects can be varied for different EZ-KIT Lites and EZ-Boards. 
For more information about the AD7147 touch controller, go to 
www.analog.com and search for AD7147.
An example program demonstrating capabilities of the touch controller is 
available in the 
Examples folder of the installation directory.
Serial ROM
The Blackfin Landscape LCD EZ-Extender is equipped with a 2 KB serial 
ROM device (M24C02) for revision and configuration control: bill of 
materials and PCB revision information is available by reading the ROM. 
The part connects to the Blackfin processor via the processor’s TWI inter-
face. By default, the serial ROM is read-only to protect the internally 
stored contents. On the extender, the last three significant TWI address 
bits are strapped to logic ‘
0’ (default). To modify the last three significant 
TWI address bits, use the provided jumpers; see “Jumper Settings” on 
page 2-3 for more information. 
For more information on the M24C02 device, go to the STMicroelectron-
ics Web site.
More information on the revision and configuration control is available in 
the 
Examples folder of the installation directory. 
						

							Example Programs
1-6 Blackfin Landscape LCD EZ-Extender Manual
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 Board Support Package. 
						

							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 on the EZ-Extender. 
						

							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 interconnect (SPI) interface of the LCD display to one of three 
SPI select pins of the Blackfin processor. 
JP2 allows you to choose any one 
of the available SPI select pins (
SPISEL1—3) of the processor 
(seeTable 2-2). 
By default, 
JP2 is populated, so that the SPISEL1 pin of the expansion 
interface II or the parallel peripheral interface (PPI) stamp connector can 
be used. When the PPI stamp connector is used to attach the extender, 
SPISEL3 is unavailable and only SPISEL1 and SPISEL2 are available for JP2. Table 2-1. JP1 Settings
AD7147 ADDR0 JP1 Setting
ADDR0 = logic ‘0’ No jumper installed (default)
ADDR0 = logic ‘1’ Jumper installed
Table 2-2. JP2 Settings
Functionality JP2 Setting
LCD SPICS connected to SPISEL1 JP2.1 and JP2.2 (default)
LCD 
SPICS connected to SPISEL2 JP2.3 and JP2.4
LCD SPICS connected to SPISEL3 JP2.5 and JP2.6 
						

							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 
or the PPI stamp connector can be used. When the PPI stamp connector is 
used to attach the extender, 
SPISEL3 is unavailable and only SPISEL1 and 
SPISEL2 are available for JP3. 
LCD Reset Jumper (JP5) 
The LCD reset jumper (JP5) connects the reset pin of the LCD display to 
one of the following. 
 The reset pin of the EZ-KIT Lite/EZ-Board
 A general-purpose I/O (GPIO) pin of the AD7147 capacitive 
touch controller (
U3)
 A GPIO pin connected directly to the Blackfin processor Table 2-3. JP3 Settings
Functionality JP3 Setting
LCD touch 
SPICS connected to SPISEL1 JP3.1 and JP3.2
LCD touch SPICS connected to SPISEL2 JP3.3 and JP3.4 (default)
LCD touch 
SPICS connected to SPISEL3 JP3.5 and JP3.6 
						

							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 the respective 
AD7147 (
U3) control registers using the 2-wire interface (TWI) of the 
processor and control the AD7147 GPIO pin. 
When using the expansion interface II (EZ-Boards), you can also control 
the LCD display reset via the 
GPIO4 flag pin. GPIO4 connects directly to 
the processor and LCD display, and can be controlled without the need to 
communicate to the AD7147 controller. The 
GPIO4 pin is unavailable on 
the PPI stamp connector; as a result, when using a PPI connector, you can 
not use 
GPIO4to control the LCD display reset. 
PPICLK Disable Jumper (JP6)
The PPICLK disable jumper (JP6) disables and tri-states the buffer (U4) that 
drives the 5 MHz clock coming from the on-board oscillator (
U2). The 
buffer is powered via the 
V_Select pin and used for level translation of the 
3.3V oscillator to the VDDIO coming from the EZ-KIT Lite/EZ-Board. 
Use 
JP6 to disable the buffer if the PPI clock is generated via the Blackfin 
processor. This tri-states the 5 MHz clock driven by the buffer and pre-
vents any signal contention issues. By default, 
JP6 is not populated, and 
the 5 MHz clock is driven to the PPI clock line (see Table 2-5).  Table 2-4. JP5 Settings
Functionality JP5 Setting
EZ-KIT Lite/EZ-Extender reset connected to LCD reset JP5.1 and JP5.2 (default)
AD7147 GPIO pin connected to LCD reset
JP5.3 and JP5.4
GPIO4
 pin connected to LCD resetJP5.5 and JP5.6 
						

							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) can change the three least signifi-
cant address bits (
ADDR0—3) used to interface to the serial ROM device via 
the TWI interface of the Blackfin processor. By default, 
JP8 requires no 
jumpers. When no jumpers are installed, all three address bits are pulled 
low and are logic ‘
0’. This causes the serial ROM device select (address) to 
default to a binary 
1010 000. To change any one of the three least signifi-
cant address bits to a logic ‘
1’, install the respective jumper (Table 2-7).  Table 2-5. JP6 Settings
Functionality JP6 Setting
Buffer (U4) drives 5 MHz on the PPI0CLK net No jumper installed (default)
Buffer (
U4) is tri-stated Jumper installed
Table 2-6. JP7 Settings
AD7147 ADDR1 JP7 Setting
ADDR1 = logic ‘0’ No jumper installed (default)
ADDR1 = logic ‘1’ Jumper installed 
						

							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. JP8 Settings
Serial ROM TWI 
AddressJP8.5 and JP8.6 
(ADDR2) SettingsJP8.3 and JP8.4 
(ADDR1) SettingsJP8.1 and JP8.2 
(ADDR0) Settings
1010 000 No jumper (default) No jumper (default) No jumper (default)
1010 001No jumper No jumper Jumper installed
1010 010No jumper Jumper installed No jumper
1010 011No jumper Jumper installed Jumper installed
1010 100Jumper installed No jumper No jumper
1010 101Jumper installed No jumper Jumper installed
1010 110Jumper installed Jumper installed No jumper
1010 111Jumper installed Jumper installed Jumper installed
Table 2-8. JP9 Settings
Serial ROM Write Protect JP9 Setting
Read operations only Jumper installed (default)
Read and write operations No jumper installed