SLOS854D May 2014 – March 2018 DRV2605L
To take advantage of the audio-to-vibe feature, connect the DRV2605L device to a line-out source as shown in Figure 59. The full-scale range of the IN/TRIG pin in the audio-to-vibe mode is 1.8 VPP. A 1-µF capacitor is recommended to AC couple the audio source and the IN/TRIG pin. For sources smaller than 1.8 VPP, the ATH_MAX_INPUT bit in register 0x13 can scale down the input range.
The device enters audio-to-vibe mode when the MODE[2:0] bit is set to 4 in register 0x01 and when the AC_COUPLE bit in register 0x1B and the N_PWM_ANALOG bit in register 0x1D are set to 1. See the Register Map section for details.