Datasheet

Appendix A Electrical Characteristics
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor 1235
A.5 Output Loads
A.5.1 Resistive Loads
The voltage regulator is intended to supply the internal logic and oscillator. It allows no external DC loads.
A.5.2 Capacitive Loads
The capacitive loads are specified in Table A-22. Ceramic capacitors with X7R dielectricum are required.
A.5.3 Chip Power-up and Voltage Drops
LVI (low voltage interrupt), POR (power-on reset) and LVRs (low voltage reset) handle chip power-up or
drops of the supply voltage. Their function is shown in Figure A-3 .
Figure A-3. MC9S12XE-Family - Chip Power-up and Voltage Drops (not scaled)
Table A-22. - Required Capacitive Loads
Num Characteristic Symbol Min Recommended Max Unit
1
VDD/VDDF external capacitive load
C
DDext
176 220 264 nF
3
VDDPLL external capacitive load
C
DDPLLext
80 220 264 nF
V
LVID
V
LVIA
V
LVRXD
V
LVRXA
V
PORD
LVI
POR
LVRX
t
V
V
DDX
LVI enabled
LVI disabled due to LVR
V
DD