The Raspberry PI cam module (rev. 1.x) consists of a OV5647 CMOS image sensor.
The product brief in pdf format: http://www.ovt.com/uploads/parts/OV5647.pdf
Full product description: http://cdn.sparkfun.com/datasheets/Dev/RaspberryPi/ov5647_full.pdf
Serial cam control bus (SCCB): http://www.ovt.com/download_document.php?type=document&DID=63
http://www.waveshare.com/rpi-zero-v1.3-camera.htm
http://www.waveshare.com/raspberry-pi-zero-v1.3-camera-cable.htm
http://cdn.sparkfun.com/datasheets/Dev/RaspberryPi/ov5647_full.pdf
https://en.wikipedia.org/wiki/Exmor
https://www.youtube.com/watch?v=AXp0u1XsrZw
https://www.youtube.com/watch?v=1dBsrHuuzck
https://www.e-consystems.com/OV5640-70mm-MIPI-Camera-Module.asp
https://www.youtube.com/watch?v=iRAyTZMzI0c
http://raspberrypiguide.de/howtos/raspberry-pi-camera-how-to/
https://www.raspberrypi.org/magpi-issues/MagPi14.pdf
MIPI (mobile industry processor interface)
CSI (camera serial interface).