Datasheet

Appendix A Electrical Characteristics
MC9S12E256 Data Sheet, Rev. 1.10
Freescale Semiconductor 583
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.
A.3 Startup, Oscillator, and PLL
A.3.1 Startup
Table A-11 summarizes several startup characteristics explained in this section.
Table A-10. Voltage Regulator — Capacitive Loads
Num Characteristic Symbol Min Typ Max Unit
1V
DD
external capacitive load C
DDext
200 440 12000 nF
2V
DDPLL
external capacitive load C
DDPLLext
90 220 5000 nF
Table A-11. Startup Characteristics
Conditions are shown in Table A-4 unless otherwise noted
Num C Rating Symbol Min Typ Max Unit
1 T POR release level V
PORR
— — 2.07 V
2 T POR assert level V
PORA
0.97 — — V
3 D Reset input pulse width, minimum input time PW
RSTL
2——t
osc
4 D Startup from Reset n
RST
192 — 196 n
osc
5 D Interrupt pulse width, IRQ edge-sensitive mode PW
IRQ
20 — — ns
6 D Wait recovery startup time t
WRS
—14t
cyc
7 P LVR release level V
LVRR
2.25 — — V
8 P LVR assert level V
LVRA
— — 2.55 V