I was interested in understanding if from the point of electrical engineering storing the RAW data of the sensor directly into the memory of the camera require special hardware. Could be more expensive to implement a camera that store RAW format compared to a camera without this feature? I was thinking of storing the photo in RAW format may require special busses or other circuitry compared to store the data in a compressed format like .jpg.
My problem is specific to CCD and CMOS camera, I would like to understand if storing RAW format can require special hardware or is only a limitation imposed by the firmware i.e. if a change the firmware I can store acquisition in RAW format.