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5V supply for MC9S12ZVCA - How to Connect?

Question asked by Mark Sample on Feb 18, 2016
Latest reply on Feb 22, 2016 by Radek Sestak


We would like to use the MC9S12ZVCA with a 5V supply. How should the 5V supply be connected? Can we just wire the 5V to the VDDX, VDDC, etc., supply pins on the 9S12 and, if we do so, do we also need to wire 5V to the VSUP, even though the LDO won't be working at that point? Also, are the any low-voltage detect circuits associated with the VSUP (as opposed to VDDX) that would keep this approach from working and are the any low-voltage detect circuits that need to be accounted for in software?


Thank you!