Xiaomi Redmi Note 8 128Gb+6Gb Dual LTE [88/132] Proximity sensor

7.3.8. Proximity Sensor

Device implementations MAY include a proximity sensor.

If device implementations include a proximity sensor, they:

[C-1-1] MUST measure the proximity of an object in the same direction as the screen. That

is, the proximity sensor MUST be oriented to detect objects close to the screen, as the

primary intent of this sensor type is to detect a phone in use by the user. If device

implementations include a proximity sensor with any other orientation, it MUST NOT be

accessible through this API.

[C-1-2] MUST have 1-bit of accuracy or more.

7.3.9. High Fidelity Sensors

If device implementations include a set of higher quality sensors as defined in this section, and make

available them to third-party apps, they:

[C-1-1] MUST identify the capability through the android.hardware.sensor.hifi_sensors feature

flag.

If device implementations declare android.hardware.sensor.hifi_sensors , they:

[C-2-1] MUST have a TYPE_ACCELEROMETER sensor which:

MUST have a measurement range between at least -8g and +8g, SHOULD have

a measurement range between at least -16g and +16g.

MUST have a measurement resolution of at least 2048 LSB/g.

MUST have a minimum measurement frequency of 12.5 Hz or lower.

MUST have a maximum measurement frequency of 400 Hz or higher; SHOULD

support the SensorDirectChannel RATE_VERY_FAST .

MUST have a measurement noise not above 400 μg/√Hz.

MUST implement a non-wake-up form of this sensor with a buffering capability

of at least 3000 sensor events.

MUST have a batching power consumption not worse than 3 mW.

[C-SR] Is STRONGLY RECOMMENDED to have 3dB measurement bandwidth of

at least 80% of Nyquist frequency, and white noise spectrum within this

bandwidth.

SHOULD have an acceleration random walk less than 30 μg √Hz tested at

room temperature.

SHOULD have a bias change vs. temperature of ≤ +/- 1 mg/°C.

SHOULD have a best-fit line non-linearity of ≤ 0.5%, and sensitivity change vs.

temperature of ≤ 0.03%/C°.

SHOULD have cross-axis sensitivity of < 2.5 % and variation of cross-axis

sensitivity < 0.2% in device operation temperature range.

[C-2-2] MUST have a TYPE_ACCELEROMETER_UNCALIBRATED with the same quality

requirements as TYPE_ACCELEROMETER .

[C-2-3] MUST have a TYPE_GYROSCOPE sensor which:

MUST have a measurement range between at least -1000 and +1000 dps.

MUST have a measurement resolution of at least 16 LSB/dps.

MUST have a minimum measurement frequency of 12.5 Hz or lower.

MUST have a maximum measurement frequency of 400 Hz or higher; SHOULD

Page 88 of 132