Upstream Control Lines
According to the Camera Link standard, four LVDS signals are reserved for general-purpose camera control.
They are defined as camera inputs and frame grabber outputs. Camera manufacturers can define these signals to meet their needs for a particular product. The signals are:
- Camera Control 1 (CC1)
- Camera Control 2 (CC2)
- Camera Control 3 (CC3)
- Camera Control 4 (CC4)
Each control line can be configured as:
- Reset signal: a transition (either rising or falling edge) on this line resets the camera. This action initiates either a new exposure/readout, or a readout of a frame for an area-scan camera or a line for a line-scan camera.
- Expose control signal
- The leading edge (either rising or falling edge) on this line initiates a new exposure.
- The trailing edge terminates the exposure and initiates the readout of a frame for an area-scan camera or a line for a line-scan camera.
- The pulse width is actually the exposure time.
- GPIO
Usually, CC1 is used for reset or expose signal for asynchronous reset cameras.
This board does not provide HDRIVE, VDRIVE signals. Usually, Camera Link cameras do not need genlocking.