Datasheet

Digital Accelerometer (ADXL345)
1-6 WVGA/LCD EI3 Extender Board Manual
processor. The push buttons and scroll wheel are copper pads on the PCB.
Touch the respective button or traverse around the wheel with a finger to
enable sensor pads and generate an interrupt request. An interrupt signal
from the controller is connected to a GPIO signal on the processor. The
GPIO signal is configured via a software switch. Refer to “AD7147 Inter-
rupt Signal” for more information.
For more information about the AD7147 capacitive touch controller, go
to www.analog.com and search for AD7147.
An example program demonstrating capabilities of the touch controller is
available by installing the product BSP.
Digital Accelerometer (ADXL345)
The WVGA/LCD EI3 Extender Board is equipped with an Analog
Devices 3-axis accelerometer (ADXL345) with high-resolution (13-bit)
measurement at up to +/- 16g. Digital output data is formatted as 16-bit
twos complement and accessible through SPI or TWI.
Two interrupt signals from the ADXL345 accelerometer are connected to
two GPIO signal of the processor. The GPIO signals are configured via a
software switch (see “ADXL345 Interrupt Signals”). The SPI port or the
TWI port is used for communications between the controller and proces-
sor; see “ADXL345 TWI/SPI Mode Select” for more information. The
SPI signals are configured via software as described in “ADXL345 SPI
Chip Select”. Refer to “WVGA/LCD EI3 Extender Board Schematic” on
page B-1 for more information.
For more information about the ADXL345 accelerometer, go to www.ana-
log.com
and search for ADXl345.
An example program demonstrating capabilities of the accelerometer is
available by installing the product BSP.