MultiCam Boards Documentation > GRABLINK series Documentation > GRABLINK Full XR Handbook > Functional Specification > Camera Link Interface > Enable Signals

Enable Signals

The standard defines 4 enable signals:

The standard requires that all four enable signals are provided by the camera to all channel links. For the 80-bit configuration, only two signals —FVAL and LVAL— are delivered by the camera.

The enable signals are used differently according to the selected acquisition mode.

Acquisition mode

FVAL usage

LVAL usage

DVAL usage (*)

Spare usage (**)

Area-scan

Start of frame

Start of line

Clock enable (optional)

Unused

Line-scan

Unused

Start of line

Clock enable (optional)

Unused

Raw grabbing

Frame cover

Unused

Clock enable (optional)

Unused

(*) The usage of DVAL is optional. By default, the board is configured to ignore DVAL.

(**) The spare signal is always ignored.