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CMA3000-D01DEMO Datasheet(PDF) 11 Page - VTI technologies |
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CMA3000-D01DEMO Datasheet(HTML) 11 Page - VTI technologies |
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11 / 35 page  CMA3000-D0X Series VTI Technologies Oy 11/ 35 www.vti.fi Doc.Nr. 8281000.12 Rev. 0.12 2.6 Interrupt function (INT-pin) 2.6.1 Usage Depending on the CMA3000 operational configuration, the INT-pin can give an interrupt in following cases: 1. Normal measurement mode: INT-pin gives interrupt when new data is available 2. Free fall detection mode: INT-pin gives an interrupt to signal that free fall is detected 3. Motion detection mode: INT-pin gives an interrupt to signal that motion is detected Interrupt polarity (active high/low) can be configured with CTRL register's INT_LEVEL bit. If the CMA3000 is in normal measurement mode, the INT pin is automatically cleared by reading the acceleration output data. INT-pin data ready functionality can be disabled by setting the CTRL register's INT_DIS bit. If INT-pin gives an interrupt in free fall or motion detection mode, the INT_STATUS register must be read to acknowledge and clear the interrupt. In motion detection mode the INT_STATUS register content gives information of which XYZ directions have exceed the trigger conditions. See section 3.3 for CTRL and INT_STATUS register details. 2.7 Clock The CMA3000 has an internal factory trimmed oscillator and clock generator. Internal frequencies vary product by product. |
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