Datasheet

Appendix A Electrical Characteristics
MC9S12E256 Data Sheet, Rev. 1.10
582 Freescale Semiconductor
A.2.1 Chip Power-up and LVI/LVR Graphical Explanation
Voltage regulator sub modules LVI (low voltage interrupt), POR (power-on reset) and LVR (low voltage
reset) handle chip power-up or drops of the supply voltage. Their function is described in Figure A-1.
Figure A-1. Voltage Regulator — Chip Power-up and Voltage Drops (not scaled)
V
LVID
V
LVIA
V
LVRD
V
LVRA
V
PORD
LVI
POR
LVR
t
V
V
DDA
V
DD
LVI enabled LVI disabled due to LVR