User Manual

OTHER PERIPHERALS
7. Sensors and other peripherals
A set of additional onboard sensors and devices adds yet
another layer of usability to the mikromedia 3 development
board.
7.1 Ambient light sensor
7.2 Digital motion sensor
An ambient light sensor (ALS) (1) can be used for dimming the screen
intensity in low-light conditions, allowing for the lower power consumption.
It can also be used to detect the proximity and turn on the screen or
increase its brightness when the user approaches. The ALS sensor on the
mikromedia 7 can be utilized in many ways. The LTR-329ALS-01 sensor
uses the I2C interface to communicate with the host MCU.
The FXOS8700CQ, an advanced integrated 3-axis accelerometer and 3-axis
magnetometer, can detect many different motion-related events, including the
orientation event detection, freefall detection, shock detection, as well as tap,
and double-tap event detection. These events can be reported to the host MCU
over two dedicated interrupt pins, while the data transfer is performed over the
I2C communication interface. The FXOS8700CQ sensor can be very useful for
display orientation detection. It can also be used to turn mikromedia 3 into a
complete 6-axis e-compass solution. The I2C slave address can be changed by
using two SMD jumpers grouped under the ADDR SEL label (2).
P A G E 24
13
Figure 15: mikromedia 3 partial front view
mikromedia 3 for STM32 CAPACITIVE U S E R M A N U A L