EVAL-ADXL346Z Analog Devices Inc, EVAL-ADXL346Z Datasheet - Page 8

• Manufacturer Part Number: EVAL-ADXL346Z
• Description: Inertial Sensor Evaluation System
• Manufacturer: Analog Devices Inc

Specifications of EVAL-ADXL346Z

• Silicon Manufacturer: Analog Devices
• Silicon Core Number: ADXL346
• Kit Application Type: Sensing - Motion / Vibration / Shock
• Application Sub Type: Accelerometer
• Silicon Family Name: IMEMS
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

UG-012
INTERRUPT CONFIGURATION TAB
The Interrupt Configuration tab is used to demonstrate the
built-in functions of the ADXL346. By selecting which functions to
enable and configuring the appropriate parameters, the benefits
and uses of the interrupts can be examined. This tab is updated
whenever an interrupt occurs. This means that some interrupts,
such as inactivity, if enabled alone, will not appear to be
updated.
The Current Status indicators are updated when the panel is
first activated and when the Configure Interrupts button is
clicked. They show the register values at the time of the read.
The Interrupt System Parameters box is used to set the built-in
interrupt parameters. Here, the thresholds for tap and activity
events can be set, as well as the many timer values for the
interrupt parameters. The units of each are shown after the
parameter register name, and entered values are automatically
rounded to the nearest valid value.
ADXL346 Evaluation GUI
Figure 13. Interrupt Configuration Tab
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The indicators for ACT_INACT_CTL and TAP_AXIS are used
to select the axes to include in activity, inactivity, and tap events.
For more details, refer to the ADXL346 data sheet. Clicking an
indicator causes it to toggle values. A lit indicator causes a value
of 1 to be written to that bit, and an unlit indicator causes a value
of 0 to be written to that bit.
In the Interrupt Configuration box, you can select the
interrupts to enable. For purposes of the GUI, all enabled
interrupts are mapped to the INT2 pin. Selecting the checkbox
next to the appropriate interrupt enables it.
Note that no registers or parameters are updated after setting
any individual box or indicator. To configure the interrupts
based on new values entered in this box, you must click the
Configure Interrupts button in the bottom right corner.
Clicking this button updates the Current Status indicators and
configures the interrupts as set.
The INT_SOURCE, ACT_TAP_STATUS, and TAP_SIGN
indicators are updated when an interrupt occurs. The data
ready (DR), watermark (WM), and overrun (OR) bits are
always set because this tab does not service data-related interrupts.
In the configuration shown in Figure 13, the accelerometer has
detected inactivity. If the accelerometer were moved with
enough force to exceed the 504 mg activity threshold, the
INACT indicator would dim and the ACT indicator would light
up. If the accelerometer were put down and undisturbed for the
1 sec inactivity time, the ACT indicator would dim and the
INACT indicator would again light up.
Evaluation Board User Guide