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Known Issues
17
SBOU155B – October 2015 – Revised February 2017
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Copyright © 2015–2017, Texas Instruments Incorporated
Revision History
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Known Issues
List of known issues for the hardware revision Rev2P0:
•
Hardware issues:
–
When the USB cable is connected, the red LED on the illumination board turns on even when the
power switch is in the off position. This is behavior is not harmful and the rest of the circuit is
indeed powered off. Occasional blinking may also be observed.
–
The lens mount has no alignment tabs. This results into incorrect centering and hence noticeable
vignetting near the corners of the image.
–
Hot unplug of power supply DC jack may lead to power failure and board reset.
–
The OPT8241 LVDS data capture on the TFC has latency issues and will be fixed in a future
OPT9221 firmware. As of firmware version 0.23, the latency issue is not resolved. The issue
manifests itself as a 1-in-8 column pattern both in phase and amplitude images and disappears
when "data_latency" parameter is adjusted by ±1.
•
Calibration issues:
–
Frequency calibration is not performed on the boards. This may lead to gain errors in distance
measurement.
–
Non-linearity calibration is not performed on the boards. This may lead to varying phase slopes
versus distance.
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Related Documentation From Texas Instruments
Related documentation regarding the EVM is available here:
http://www.ti.com/tool/opt8241-cdk-evm
. The
documentation related to the ToF chipset used in the EVM is available in the following:
•
Sensor -
http://www.ti.com/product/OPT8241
•
Time-of-Flight Controller -
http://www.ti.com/product/OPT9221
Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from A Revision (February 2016) to B Revision
.............................................................................................
Page
•
Added class A product statement pertaining to EN 61326-1:2013 in the
Safety
section.
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