Problem on connecting OV5640 Camera with I2C Master

Hi There,


Problem Statement:
When we connect OV5640 camera with I2C master (not SCCB) it should not send an ACK on the 9th clock cycle and, therefore, should not work with our I2C master. However, when we connect our I2C master to the OV5640 camera, we are observing an ACK.
Help:
We reviewed the documentation but could not find explicit confirmation that the camera should send an ACK. Can someone please explain what may be the issue?

Thanks,
Vhigneshwaran