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ADZS-BFLLCD-EZEXT

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45
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
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.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45

ADZS-BFLLCD-EZEXT

Mfr. #:
Buy ADZS-BFLLCD-EZEXT
Manufacturer:
Analog Devices Inc.
Description:
Daughter Cards & OEM Boards Blackfin Landscape LCD EZ-Extender
Lifecycle:
New from this manufacturer.
Delivery:
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