MC9S12KT256 Datasheet, PDF (565/594 Pages) Freescale Semiconductor, Inc – Microcontrollers

A.3 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.
V
V_LVID
V_LVIA
V_DDA
V_DD
V_PORD
V_LVRD
V_LVRA
LVI
POR
t
LVI Enabled
LVI Disabled due to LVR
LVR
Figure A-1. Voltage Regulator — Chip Power-up and Voltage Drops (not scaled)
MC9S12KT256 Data Sheet, Rev 1.15
Freescale Semiconductor
565