S50 Hardware User Guide
1VV0301505 Rev. 3
Page 14 of 60
2021-05-05
Not Subject to NDA
It is strongly recommended NOT to switch the module power
supply on/off while other parts of the circuitry stay powered. This
mostly leads to hardly controllable back-feeding issues.
Due to the ultra-low power design a few µAmps are enough to
raise VSUP to an undefined state, which may cause a hang-up
deadlock if power is switched on again.
Any I/O pin at a voltage > 0,3V while the supply VSUP is at 0V
violates the abs. max. ratings given in chapter 5.1 Absolute
Maximum Ratings.
It is instead recommended to use the advanced power
management features, which may reduce the supply current to
300nA.
