OV2640 with 18 Pins - No XLCK System Clock I'm trying to connect an OV2640 camera module to a microcontroller.

This camera module has only 18 pins as seen in this schema:
https://imgur.com/a/SGpfrXt

Here an image of the module:
https://imgur.com/a/7MOIDwi

These pins are on the module:


3.3V
GND
VSYNC 
SCL 
SDA
HREFF
D0 - D7
DCLK
PWDN
NC


Maybe I could set XLCK and PLCK via the DCLK pin but I don't know how.

I am pretty new to camera modules and searched the net a lot of times. Most examples are for the OV7670. This module has also 18 Pins but all are used quiet contrary to the OV2640.

Could anybody help me connect and get a signal?
In this specific OV2640 module, it's supposed to have a 12MHz oscillator in the board connected to XLCK pin (you can all time adjust the PLL trough SCCB interface as usual). Remove the plastic lens and see near the CMOS.
Regards