JAJSF42B April 2018 – June 2019 DLPC3478
Pattern display is one of the key capabilities of the DLPC3478 display and light controller. When the DLPC3478 controller is configured for pattern display, video processing functions can be bypassed to allow for accurate pattern display. For user flexibility and simple system design the DLPC3478 controller supports both external pattern and internal pattern streaming modes. In external pattern streaming mode, patterns are sent to the DLPC3478 controller over parallel interface. In internal pattern streaming mode, 1D patterns are pre-loaded in flash memory and a host command is sent to DLPC3478 controller to display the patterns. Internal pattern mode allows for a simple system design by eliminating the need for any external processor to generate and sent 1D patterns to the DLPC3478 controller.
The DLPC3478 controller outputs two configurable Trigger Out and one Trigger In signal to synchronize patterns with a camera, sensor, or other peripherals.
|TRIG_OUT_1||External Pattern Mode: Active during each input frame.|
|Internal Pattern Mode: Active during a predefined group of patterns.|
|TRIG_OUT_2||Active during display of each pattern. When operating in external pattern mode, one input frame can have multiple patterns.|
|TRIG_IN||Active in Internal Pattern Display mode only. Trigger In signal is used to advance to next patterns in internal pattern mode.|