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DLPC3479: Pattern loading and dark time jitter

Part Number: DLPC3479

Tool/software:

I am controlling the DLPC3479 using I2C.
When projecting continuously, there are rare cases where the PAT_READY signal stays low for a long period of time.
How much jitter should I look at in the dark time and pattern load time?
When I measured it, it was sometimes 250 us longer than usual.

Projection pattern: Internal pattern (8bit Vertical pattern)
Number of patterns in pattern set: 1 pattern
ExposureTime: 4000us
Pre-exposure dark time: 327us
Post-exposure dark time: 58us

4(Green) : Trigger (host->DMDC, rising edge)
2(Cyan) : PAT_READY
3(Magenta): Projection

normal


abnormality