3D Hall 8 Click Board

Product Description

How Does The 3D Hall 8 Click Board™ Work?

The 3D Hall 8 Click Board™ as its foundation uses the TLI493D-W2BW, a low-power 3D Hall sensor with an I2C interface and Wake-Up feature from Infineon. It consists of three central functional units; containing a power mode control system, a low-power oscillator, basic biasing, Undervoltage detection, and a fast oscillator. Besides, it has also implemented the sensing unit, which contains the HALL biasing, HALL probes with multiplexers and successive tracking ADC, and a temperature sensor. This sensor offers several use cases, including innovative human-machine interfaces in the form of industrial and consumer joysticks and precise position control in robotics.

The power mode control provides the power distribution, which manages the Start-Up behaviour in the TLI493D-W2BW, a power-on reset function, and a specialized low-power oscillator, the clock source. The sensing unit measures the magnetic field in the X, Y, and Z directions. Each X-, Y- and Z-Hall probe is connected sequentially to a multiplexer, connected to an analogue to digital converter. Optional, the temperature measurement feature, activated in the default state, can be determined after the three Hall channels.

3D Hall 8 Click communicates with MCU using the standard I2C 2-Wire interface to read data and configure settings, supporting Fast Mode operation with a clock frequency up to 1MHz. For each of the three magnetic channels (X/Y/Z), the Wake-Up function has an upper and lower comparison threshold. Each component of the applied field is compared to the lower and upper thresholds. If one of the results is above or below these thresholds, an interrupt is generated called a Wake-Up function. The Wake-Up mode allows the sensor to continue making magnetic field measurements while the MCU is in the power-down state, which means the microcontroller will only consume power and access the sensor if relevant measurement data is available.

An interrupt pin signals a finished measurement cycle but also can be used for I2C clock stretching. In this case, the INT pin must be connected to the SCL pin, which can be done by populating the jumper labelled JP1.

The 3D Hall 8 Click Board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before use with 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.

SPECIFICATIONS

PINOUT DIAGRAM

This table shows how the pinout of the 3D Hall 8 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
NC	1	AN	PWM	16	NC
NC	2	RST	INT	15	INT	Interrupt
NC	3	CS	RX	14	NC
NC	4	SCK	TX	13	NC
NC	5	MISO	SCL	12	SCL	I2C Clock
NC	6	MOSI	SDA	11	SDA	I2C Data
Power Supply	3.3V	7	3.3V	5V	10	NC
Ground	GND	8	GND	GND	9	GND	Ground

ONBOARD SETTINGS AND INDICATORS

3D HALL 8 CLICK ELECTRICAL SPECIFICATIONS

Software Support

void application_task ( void )
{
 c3dhall8_data_t sens_data;
 c3dhall8_read_sensor_data( &c3dhall8, &sens_data );
 log_printf( &logger, "> X[mT]: %.2frn> Y[mT]: %.2frn> Z[mT]: %.2f rn> Temperature[C]: %.2frn",
 sens_data.x_axis, sens_data.y_axis, sens_data.z_axis, sens_data.temperature );
 float magnetic_match = c3dhall8_get_xyz_magnetic_matching( &c3dhall8, sens_data );
 log_printf( &logger, "> XYZ magnetic matching: %.2frn", magnetic_match );
 log_printf( &logger, "**************************************rn" );
 Delay_ms( 500 );
}

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