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HLMP-ED80-PS000 Scheda tecnica(PDF) 2 Page - AVAGO TECHNOLOGIES LIMITED |
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HLMP-ED80-PS000 Scheda tecnica(HTML) 2 Page - AVAGO TECHNOLOGIES LIMITED |
2 / 14 page 2 TheoryofOperation NavigationTechnology The heart of the ADNS-3040 navigation sensor is a CMOS image array. An LED and an optical system illuminate the surface that the ADNS-3040 is navigating on. The texture of the surface casts bright and dark spots forming distinct images as the sensor is moved across the surface. A Digital Signal Processing (DSP) engine and its built-in algorithm evaluate these images and determine the magnitude and direction of the movement. Lens Image Array LED Lens Surface Shadow pattern Figure 1. ADNK-3034-TI27 Reference Design Mouse functional Block Diagram RF Board Left Button Avago ADNS-3040 Optical Mouse Sensor Wheel Button Right Button Z Optics TI MSP430F1222 Microcontroller MISO MOSI SCLK NCS Control and Data MAX1722 Boost Regulator Quadrature Signals The motion data is made available in the delta_X and delta_Y registers for the system controller to retrieve. An extensive power saving topology is implemented within the ADNS-3040 navigation engine. A Motion pin (output) is available to act as the system interrupt. As long as there is no motion the system can remain in Sleep mode allowing maximum battery power saving. Based on the last detected motion the ADNS-3040 navigation engine enters various power saving modes when no new motion occurs. These power saving features make the ADNS-3040 ideally for wireless applications. Figure 2. Illustration of Optical Navigation technology |
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