L3G4200DTR datasheet by STMicroelectronics

L3G4200DTR Frequently Asked Questions (FAQs)

• What is the recommended power-on sequence for the L3G4200DTR?
  The recommended power-on sequence is to first apply VDD (1.71V to 3.6V) and then apply VLOGIC (1.71V to 3.6V) after a delay of at least 1ms. This ensures proper initialization of the device.
• How do I handle the self-test function of the L3G4200DTR?
  The self-test function is enabled by setting the ST (Self-Test) bit in the CTRL_REG4 register. During self-test, the device outputs a predefined pattern on the output registers. The self-test function should be disabled before taking any measurements.
• What is the purpose of the bandwidth selection bits in the L3G4200DTR?
  The bandwidth selection bits (BW_SEL) in the CTRL_REG2 register allow the user to select the bandwidth of the gyroscope. A lower bandwidth reduces noise but increases latency, while a higher bandwidth increases noise but reduces latency.
• How do I interpret the temperature data from the L3G4200DTR?
  The temperature data is represented as a 12-bit signed integer in the OUT_TEMP register. The temperature value can be calculated using the formula: Temperature (°C) = (OUT_TEMP / 16) + 25.
• What is the purpose of the high-pass filter in the L3G4200DTR?
  The high-pass filter (HPF) is used to remove the gravity component from the gyroscope output, allowing for more accurate measurements. The HPF can be enabled or disabled using the HPEN bit in the CTRL_REG2 register.