Motorola Symbol SE4400 Integration Manual page 51

Electrical Interface
If CS* is brought low, the pixel data lines (PIX_D0 through PIX_D7) are in the output state
in acquisition mode, and are brought low in stand-by mode. If CS* is brought high, the pixel
data lines are in the output state during acquisition mode, and are in a Hi-Z state during
stand-by mode. The latter option accommodates a multi-camera system.
4-3