MC9S12E128CFUE Datasheet, PDF (573/606 Pages) Freescale Semiconductor, Inc – MC9S12E128 Data Sheet

Appendix A Electrical Characteristics
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.
V
V_DDA
V_LVID
V_LVIA
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)
A.2.2 Output Loads
A.2.2.1 Resistive Loads
The on-chip voltage regulator is intended to supply the internal logic and oscillator circuits allows no
external DC loads.
A.2.2.2 Capacitive Loads
The capacitive loads are specified in Table A-10. Ceramic capacitors with X7R dielectricum are required.
Table A-10. Voltage Regulator — Capacitive Loads
Num
Characteristic
1
V_DD external capacitive load
2
V_DDPLL external capacitive load
Symbol
Min
C_DDext
200
C_DDPLLext
90
Typical
440
220
Max
Unit
12000
nF
5000
nF
MC9S12E128 Data Sheet, Rev. 1.07
Freescale Semiconductor
573