EPC635 datasheet(57/97 Pages) EPC

57 / 97 page

tion period is finished and the first frame data is available. The epc635 signals this by setting VSYNC and HSYNC active. Pixel data can be

read DCLK by DCLK as long the HSYNC signal is active. Refer also to Figure 42 and Figure 43. The application has to take care of its

own, to update synchronously all necessary frame, row and pixel readout counters of the application during the the whole measurement

cycle.

Only if the validity and the necessary quality level of the measured data are given, the result of the distance is correct and reliable. The

generic validity and quality of the data is independent of any correction or compensation algorithms. It is given by the complete epc635

camera system with chip, lens, illumination and environmental conditions.

TOF measurement

validity?

decrease

integration time

increase

integration time

Pixel saturated = yes

all other

validity?

min. one | DCSx | > 2'000 LSB

Calculate

TOF amplitude A

TOF

quality?

TOF > 2'000 LSB

TOF < 25 LSB

all other

Calculate ratio AMR

ambient to mod. light

quality?

AMR > 60 dB (or >70dB)

all other

Calculate

corrected distance

continue?

quality?

END

TOF

< 100 LSB

all other

yes

START

if necessary

B&W measurement

(ambient-light)

No object ?

all four | DCSx | < 25 LSB

No object ?

validity?

Figure 54: Generic validity and quality flow chart for a single pixel

Regarding possible correction and compensation algorithms refer to e.g. ESPROS' application note AN10 or the Handbook epc600

(AN07), which are available on the ESPROS website.

Characteristics subject to change without notice

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Datasheet_epc635-V1.02

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