HOW DOES IT WORK?

Angle 8 Click as its foundation uses the MA782GGU, a low-power angle sensor with integrated wake-up angle detection from Monolithic Power Systems. It allows users to read angle position information and detect the speed or direction of magnet rotation. With its power cycling ability, the MA782GGU can be optimized for applications that require low average power. Fast data acquisition and processing provides accurate angle measurement at an applied magnetic field of 60mT. It supports a wide range of magnetic field strengths and spatial configurations, with both end-of-shaft and off-axis (side-shaft mounting), supported configurations.

The MA782GGU features magnetic field strength detection with configurable thresholds to sense the magnet position relative to the sensor for certain functions (e.g. sensing the axial movements or for diagnostics). On-chip non-volatile memory stores configuration parameters, including the reference zero angle position, the power cycling parameters, the filter window affecting the output resolution, and magnetic field detection thresholds.

The Angle 8 Click communicates with MCU using the standard SPI serial interface for angle reading and register programming, which supports SPI Mode 0 and 3 and operates at clock rates up to 25 MHz. This Click board™ uses the Enable pin labeled as EN and routed to the CS pin of the mikroBUS™ socket to optimize power consumption, used for its power ON/OFF purposes. It has three power modes: Active, Idle, and Automatic sampling cycle (ASC). By combining these three power modes, the MA782GGU can be operated in different ways. In ASC mode, the MA782GGU switches between Active and Idle mode. The selection can be made by positioning SMD jumper labeled as ASC SEL to an appropriate position marked as 0 or 1.

Besides this pins, it also uses two indicators, new data and data valid indicators labeled as ND and DV routed to the AN and RST pins of the mikroBUS™ socket. In ASC mode, the ND signal indicates when new data is ready to be read, or if the displacement exceeds the defined threshold, while the DV signal indicates the stabilization of the digital filter. It also has the magnetic flag used to indicate when the sensor position's magnetic field is out of range, defined by the lower magnetic field thresholds, routed on the INT pin of the mikroBUS™ socket labeled as MGL.

This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.