AWINIC AW86225, Руководство пользователя

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AW86225
October 2021 V1.9
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 Set VBAT_GO to 1 in register 0x52;
 Wait 3ms;
 Set EN_RAMINIT to 0 in register 0x43;
 Read VBAT in register 0x55 and VBAT_LO in register 0x57.
The code is a 10bit unsigned number.
𝑉𝐷𝐷 =
6.1 × (𝑉𝐵𝐴𝑇 × 4 + 𝑉𝐵𝐴𝑇_𝐿𝑂)
1024
(𝑉)
Constant Vibration Strength
The device features power-supply feedback. If the supply voltage discharge over time, the vibration strength
remains the same as long as enough supply voltage is available to sustain the required output voltage. It is
especially useful for ring application. Power-supply feedback only works in CONT playback mode.
Use steps:

Set VBAT_MODE to 1 in register 0x43;
 Initiates a CONT playback request.
LRA Consistency Calibration
Different motor batches, assembly conditions and other factors can result in f0 deviation of LRA. When the
drive waveform does not match the LRA monomer, the vibration may be inconsistent and the braking effect
becomes worse, especially for short vibration waveforms. So it's necessary to perform consistency calibration
of LRA. Firstly, the power-on f0 detection can be launched to get the f0 of LRA. Secondly the waveform
frequency stored in SRAM and the f0 of LRA are used to calculate the code for calibration. The f0 accuracy
after LRA consistency calibration is ±2Hz.
LRA Resistance Detect
Software can send command to detect the LRA’s resistance.
Detect steps:
 Set EN_RAMINIT to 1 in register 0x43;
 Read D2S_GAIN register and save the result as d2s_gain_pre;
 Set D2S_GAIN with an appropriate with in register 0x49;
 Set RL_OS to 1 in register 0x51;
 Set DIAG_GO to 1 in register 0x52;
 Wait 3ms;
 Set EN_RAMINIT to 0 in register 0x43;
 Restore the value of D2S_GAIN register to d2s_gain_pre;
 Read RL in register 0x53 and RL_LO in register 0x57.
Based on this information host can diagnosis used LRA’s status. The code is a 10bit unsigned number.
𝑅𝐿 =
678 × (𝑅𝐿 × 4 + 𝑅𝐿_𝐿𝑂)
1024 × D2S_GAIN
(𝛺)
The values of the D2S_GAIN that can be configured for different sizes of RL are listed below. The higher the
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