In free running mode the DLPC3479
controller generates an internal synchronization signal to display pre-stored
patterns. User sends an I2C command to instruct DLPC3479 controller to
start download of the 1D patterns from flash memory into DLPC3479 controller’s
internal memory and displaying of the 1D patterns.
- The device displays multiple 1D patterns within an
internally-generated VSYNC signal. tExposure (exposure
time), tDarkPre, and tDarkPost (dark time) are equal for
all the 1D patterns within one internally generated VSYNC frame.
- Blue LED is configured to be ON for each pattern.
- TRIG_OUT_1 (Frame Trigger) is configured active high polarity
and will have a minimum pulse width of 20 microseconds. TRIG_OUT_1 delay
(tD1) is configured with respect to internally generated
VSYNC.
- TRIG_OUT_2 (Pattern Trigger) is configured active high polarity
and stays active during the pattern exposure. TRIG_OUT_2 delay (tD2)
is configured with reference to the start of each pattern.
- VSYNC is generated internally according to different
sets of patterns stored in the SPI flash memory.