The ACTIVE_SIZE register encodes the number of active pixels per scan line and the number of active scan lines per frame. The lower half-word (bits 12:0) encodes the number of active pixels per scan line. Supported values should be between 32 and the value provided in the Maximum number of pixels per scan line field in the GUI. The upper half-word (bits 28:16) encodes the number of active pixels per scan line. Supported values should be 32 to 7680. To avoid processing errors, restrict values written to ACTIVE_SIZE to the range supported by the core instance.