Gyro 4 Click Board™

The L20G20IS IC supports SPI interface which allows the Gyro 4 Click Board™ to be interfaced with a wide range of different MCUs. The IC interface is manufactured using a CMOS process that allows a high level of integration to design a dedicated circuit which is trimmed to better match the characteristics of the sensing element. It's perfect solution for optical image stabilization applications.

How Does The Gyro 4 Click Board™ Work?

The Gyro 4 Click Board™ features L20G20IS two-axis MEMS gyroscope, from ST microelectronics. An angular rate gyroscope is a device that produces a positive-going digital output for counterclockwise rotation around the sensitive axis considered. Sensitivity describes the gain of the sensor and can be determined by applying a defined angular velocity to it. This value changes very little over temperature and time.

The zero-rate level describes the actual output signal if there is no angular rate present. The zero-rate level of highly accurate MEMS sensors is, to some extent, a result of stress to the sensor and therefore the zero-rate level can slightly change after mounting the sensor on a printed circuit board or after exposing it to extensive mechanical stress. This value changes very little over temperature and time. The L20G20IS includes temperature sensor and data can be retrieved from the registers, as two's complement data in 12-bit format left-justified. The output of the temperature sensor is 0 at 25 °C.

On the L20G20IS the angular rate data can be retrieved using a synchronous read. To perform a synchronous read, CTRL4_OIS (0Eh R/W) (DRDY_EN) has to be set to '1' in order to enable the data-ready interrupt on the INT pin. To properly perform a synchronous read, the angular rate data have to be read every time the DRDY pin goes high. The INT signal can be latched (default condition) or pulsed.

When a latched condition is selected, the interrupt goes low when the high part of one of the output channels is read and returns high when new data is generated. When a pulsed condition is selected, the interrupt behavior is independent from the read operations and remains high for 75 µs every time new data is generated. The INT pin is set by default as push-pull output, but it can be configured as open-drain output.

SPECIFICATIONS

PINOUT DIAGRAM

This table shows how the pinout of the Gyro 4 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

ONBOARD SETTINGS AND INDICATORS