AN092
© Kionix 2019 All Rights Reserved
11 July 2019
Page 2 of 27
3.
Quick Start Implementations
Here we present several basic ways to initialize the part. These can vary based on desired operation,
but generally the initial operations a developer wants to do are: 1) read back acceleration data
asynchronously, 2) read back acceleration data when next data is ready via interrupt (synchronous
data reading), 3) use of the sample buffer, 4) use the Wake-Up function, 5) activate the tilt position
function, 6) activate the tap/double-tap function, and 7) activate the free-fall function. These cursory
solutions are provided as a means for configuring the part to a known operational state. Note that
these conditions just provide a starting point, and the values may vary as developers refine their
application requirements.
3.1.
Asynchronous Reading
This example configures and enables the accelerometer to start outputting sensor data that
can be asynchronously read from the output registers.
-
Write 0x00 to Control 1 (CNTL1) to set the accelerometer in stand-by mode
Register Name
Address
Value
CNTL1
0x1B
0x00
-
Write 0x06 to Output Data Control (ODCNTL) to set the Output Data Rate (ODR) of the
accelerometer to 50 Hz.
This step is optional as this is also a default setting.
Register Name
Address
Value
ODCNTL
0x21
0x06
-
Write 0xC0 to Control 1 (CNTL1) to set the accelerometer into operating mode (PC1=1), full
power mode (RES=1), data ready disabled (DRDYE=0), range to ±2g (GSEL=0).
Register Name
Address
Value
CNTL1
0x1B
0xC0
-
Acceleration data can now be read from the XOUT_L, XOUT_H, YOUT_L, YOUT_H,
ZOUT_L, and ZOUT_H registers in 2’s complement format asynchronously. To reduce the
duplicate sensor data, wait at least 1/ODR period before reading the next sample.
