Analog Devices Blackfin Landscape LCD EZ-Extender ADZS-BFLLCD-EZEXT, Руководство пользователя

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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.