SLOS825E December 2012 – April 2018 DRV2605
The real-time playback mode is a simple, single 8-bit register interface that holds an amplitude value. When real-time playback is enabled, the real-time playback register is sent directly to the playback engine. The amplitude value is played until the user sends the device to standby mode or removes the device from RTP mode. The RTP mode operates exactly like the PWM mode except that the user enters a register value over the I2C rather than a duty cycle through the input pin. Therefore, any API (application-programming interface) designed for use with a PWM generator in the host processor can write the data values over the I2C rather than writing the data values to the host timer. This ability frees a timer in the host while retaining compatibility with the original software.
For the LRA, the DRV2605 device automatically tracks the resonance frequency.