Bitstream Setting BITSTREAM.GENERAL.XADCPOWERDOWN

[cmehring3]

Could anyone shed light on what the bitstream setting in the subject is used for? If the XADC is not instantiated in a particular FPGA design, does this bitstream setting need to be set in order to guarantee that the XADC draws as little power as possible?

I understand that it could be clear from the verbiage of the command but I cannot find reference to this setting in UG908, Appendix A. Perhaps the setting is deprecated and does not change anything. It could also be missing from UG908, or something defined elsewhere that I cannot find.

Thank you in advance.

[cmehring3]

Has anyone been able to look into this?

[markg@prosensing.com]

@cmehring3 

According to AR#54073, you can see the BITSTREAM properties that apply to your device, by typing the following Tcl command into the Tcl Console of Vivado open-implemented design.

report_property -all [current_design] BITSTREAM*

If you find XADCPOWERDOWN in the resulting list, then it should apply to your device.

According to <this> post, XADCPOWERDOWN shuts down the XADC. 

I see from page 45 of document PG091(Oct 5, 2016) that powering down parts of the XADC is also possible using the XADC Wizard IP.

Cheers,
Mark