It's not that ionic bonds are weaker than hydrogen bonds, but that the energy cost of breaking the ionic bonds is well compensated by the gain in solvation energy when you put NaCl in solution.  Solvation energy drives the spontaneity of this dissolution process, because of entropic considerations.

Why Ionic compounds dissolve into water
I am trying to get SPI working on an MCU. The SCK on the MCU is labelled \$\overline{SCK}\$ which means it active low but my device has no overline on the SCK. Can I use the same clock. If not what can I do?
