SLOS825E December 2012 – April 2018 DRV2605
During closed-loop operation the actuator feedback allows the output voltage to go above the rated voltage during the automatic overdrive and automatic braking periods. This register sets a clamp so that the automatic overdrive is bounded. This bit also serves as the full-scale reference voltage for open-loop operation.
See the Overdrive Voltage-Clamp Programming section for calculating the correct register value.