BNO08X

Part: BNO08X — CEVA's Hillcrest Labs business unit Type: System in Package (SiP) Sensor Hub Description: A System in Package (SiP) integrating a triaxial accelerometer, triaxial gyroscope, magnetometer, and a 32-bit ARM Cortex-M0+ microcontroller running SH-2 firmware with MotionEngine software for real-time 3D orientation, heading, and calibrated motion data.

Operating Conditions:

• Supply voltage: 1.62–3.6 V
• Operating temperature: -40 to +85 °C

Absolute Maximum Ratings:

• Max supply voltage: 4.3 V
• Max junction/storage temperature: 125 °C

Key Specs:

• Supply voltage (VDD): 1.62 V (min) to 3.6 V (max)
• I/O voltage (VDDIO): 1.62 V (min) to 3.6 V (max)
• Operating temperature: -40 °C (min) to +85 °C (max)
• Standby current: 100 μA (typical)
• Sleep current: 30 μA (typical)
• Full feature current: 30 mA (typical)
• Gyro rotation vector latency: < 3 ms
• Gyro rotation vector report rate: 1 kHz

Features:

• Android compliant 4.4 KitKat and above
• Variety of 3D orientation outputs (including linear acceleration, rotation vectors, gravity)
• Includes 'always-on' and classification features (step counter, stability and tap detectors, and a variety of gestures)
• Dynamically calibrates sensor data for temperature and aging
• Low latency, 1kHz gyro rotation vector for AR/VR applications
• Supports new sensors and features in Android 4.4 KitKat
• Includes power management to optimize power
• Support for device firmware upgrade (DFU)
• Supports I2C, UART-SHTP, SPI, and UART-RVC interfaces

Applications:

• Wearables such as head trackers for AR/VR applications, smartwatches, fitness bands, audio headsets
• Smartphones
• Tablets
• Ultrabooks
• Robotics
• Internet of Things (IoT)

Package:

• 28 pin LGA 3.8mm x 5.2mm x 1.1mm

• Three sensors and microcontroller in a single device
• Supports new sensors and features in Android 4.4 KitKat
• Includes power management to optimize power
• Support for device firmware upgrade (DFU)

• Wearables such as head trackers for AR/VR applications, smartwatches, fitness bands, audio headsets
• Smartphones
• Tablets
• Ultrabooks
• Robotics
• Internet of Things (IoT)

Figure 1-6 describes the function of each pin.

Figure 1-6: BNO08X pin descriptions

The BNO08X can operate from an internal oscillator, an external 32.768 kHz clock or an external 32.768 kHz crystal. If an external clock is used it must be connected to pin 27. Hillcrest recommends a tolerance of 50ppm. If a crystal is used it must be connected across pins 26 and 27. Hillcrest recommends using a crystal with tolerance 50ppm with 12.5pF capacitor loading.

Figure 1-7: 32.768kHz crystal connection

Figure 1-6: BNO08X pin descriptions

Clock source selection is done during startup using the CLKSEL0 and CLKSEL1 pins. Figure 1-8 shows how to select each source. The internal clock source must not be used with the UART-SHTP or UART-RVC interfaces.

Figure 1-8: Clock Source Selection

CLKSEL0 is configured with an internal pulldown at startup. After CLKSEL0 has been sampled, if it is found to be a 1, the internal pulldown is disabled to avoid unnecessary power consumption. If either the external or internal clock sources are selected, then CLKSEL1 is configured as an input with a pulldown. CLSKSEL1 is then sample and the clock source determined. After CLKSEL1 has been sampled, if it is found to be a 1, the internal pulldown is disabled to avoid unnecessary power consumption.

Figure 1-9: External clock connection

Figure 1-8: Clock Source Selection

Figure 6-3: BNO08X electrical characteristics

Exposure to maximum rating conditions for extended periods may affect device reliability.

Figure 6-1: BNO08X maximum ratings

Figure 6-2: BNO08X operating conditions

The BNO08X is available in a 28-pin Land Grid Array (LGA) package. Units are in mm. Note: Unless otherwise specified tolerance = decimal ±0.1mm.

Figure 7-1: 28 pin LGA package outline (Image from Bosch)