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1. Power Connection:
   • The project clearly defines a 3.3V supply. Ensure that all components requiring power, like the BHI160B, are properly connected to the 3.3V net and that any necessary voltage ratings are respected.
2. Obsolete Component:
   • The BHI160B is listed as obsolete or not recommended for new designs by multiple distributors. Consider looking for an alternative IMU sensor for long-term viability.
3. Decoupling Capacitors:
   • Decoupling capacitors $C1$, $C2$, and $C3$ are included but ensure they are correctly placed. Typically, they should be placed close to the power pins of the ICs to minimize power supply noise.
4. Pull-up Resistors:
   • Pull-up resistors $R1$ and $R2$ on the I2C lines are specified with a 4.7k resistance, which is common in many I2C setups. Ensure this value matches system requirements.
5. Component Exclusions:
   • Certain components and nets are marked as "Exclude from BOM" and "Exclude from PCB". Verify that all necessary components are included in the BOM and PCB layout, unless intentionally omitted.
6. Net Duplications:
   • Multiple instances of the same PowerNet 3V3 and Ground nets are listed. Ensure these instances refer to the same physical connections on the board to avoid confusion.
7. Unspecified Components:
   • Components like $R3$ are marked as "DNP" (Do Not Populate) with no resistance specified. Verify if they are placeholders or need actual values.
8. License Compliance:
   • Ensure compliance with licensing terms linked to specific components if this design is to be shared or manufactured.

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• U1: BHI160B Sensor

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• Validate the functionality of the BHI160B sensor with the I2C interface.
• Ensure proper power delivery from a 3.3V supply.
• Confirm signal integrity with decoupling capacitors and pull-up resistors.
• Verify connectivity with QWIIC and pin headers.

• Electrical tests on the power supply and I2C signals.
• Functional tests to ensure proper data communication between the BHI160B sensor and microcontroller.
• Mechanical tests for fitting and connectivity of headers.

• Test bench with a 3.3V power supply.
• Oscilloscope for signal integrity and power supply tests.
• I2C-compatible microcontroller or testing module.
• Multimeter for basic connectivity and voltage level tests.

• Objective: Verify 3.3V power supply delivery.
  • Measure the voltage across $VDD$ and $GND$.
  • Check for proper voltage level (3.3V ± 5% tolerance).

• Objective: Ensure communication over I2C.
  • Connect an I2C-compatible microcontroller to $SDA$ and $SCL$ pins.
  • Send and receive test commands to check data integrity and response time.

• Objective: Confirm that pull-up resistors maintain signal level.
  • Use an oscilloscope to measure the waveform on the I2C lines.
  • Ensure proper rise and fall times meet I2C specifications.

• Objective: Verify sensor data output.
  • Implement a basic data read routine from the BHI160B sensor.
  • Validate the sensor output data against pre-determined values or changes (e.g., movement detection for accelerometer).

• Objective: Ensure all headers and connectors are correctly mounted and accessible.
  • Visually inspect and physically test connections using plug/unplug cycles.

• Define the timeline required for testing each component.
• Assign dates and responsible team members for each test phase.

• Test reports for each phase, including any issues discovered and corrective actions taken.
• Technical documentation updates based on test results.

• Schedule a review of the test results with the engineering team.
• Obtain approvals for any necessary design changes.

• Make sure all testing equipment is calibrated and functioning correctly.
• Consider revising your test procedures according to any updates in your design or requirements.

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• The BHI160B sensor is connected to a microcontroller or I2C master device.
• The system power is supplied at 3.3V.
• The I2C interface on the microcontroller is configured and operational.

1. Initialize the I2C interface on the microcontroller with standard settings, e.g., clock rate, address.
2. Send an I2C start condition followed by the BHI160B's I2C address.
3. Issue a command to read the specific register, for example, "who_am_i" register or another known register on the BHI160B, for a known response.
4. Receive the response from the BHI160B sensor.
5. Send an I2C stop condition to end the communication.
6. Verify the response data against expected values, e.g., the default register value, unique identifier, etc.

• The BHI160B sensor responds with correct data indicating successful communication.
• No errors or timeouts occur during I2C transactions.

• The microcontroller should return to its idle state, ready for further operations.

• Ensure pull-up resistors are properly connected on the I2C lines (SCL, SDA).
• Use a logic analyzer for debugging if any communication issues arise.