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Customer shared the following inquiry:
We have been using the AM5748 processor on our boards for several years now. We are now looking to use the AM5718 in a couple of our instruments to save power since we only need one core.
I wonder if you can get us some clarification on the usage of SYSBOOT15?
I’m seeing differences between the usage of SYSBOOT15. In several documents it appears that the polarity of SYSBOOT15 is opposite between the AM5748 and the AM5718, but on the development board schematics they are both pulled high.
For example:
Schematic Checklist RevB:
Compatibility Guide April 2018:
We are booting from eMMC and want the internal pull-downs disabled. We currently pull-up the SYSBOOT15 pin on all of our AM5748 designs. Should we pull-down SYSBOOT15 on our AM5718 designs to have it function the same. The only reason I am asking for clarification is that the documents claim they behave opposite of each other, but the schematic for the reference designs has SYSBOOT15 set the same for both processors.
Any direction you can provide would be greatly appreciated.
Thanks,
Matt Mott
214-236-7162
