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

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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.