MC9S12E256 Datasheet, PDF (571/602 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

A.2.2 Output Loads
Appendix A Electrical Characteristics
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
Typ
Max
Unit
440
12000
nF
220
5000
nF
A.3 Startup, Oscillator, and PLL
A.3.1 Startup
Table A-11 summarizes several startup characteristics explained in this section.
Table A-11. Startup Characteristics
Conditions are shown in Table A-4 unless otherwise noted
Num C
Rating
Symbol
Min
Typ
1
T POR release level
V_PORR
—
—
2
T POR assert level
V_PORA
0.97
—
3
D Reset input pulse width, minimum input time
PW_RSTL
2
—
4
D Startup from Reset
n_RST
192
—
5
D Interrupt pulse width, IRQ edge-sensitive mode PW_IRQ
20
—
6
D Wait recovery startup time
t_WRS
—
7
P LVR release level
V_LVRR
2.25
—
8
P LVR assert level
V_LVRA
—
—
Max
2.07
—
—
196
—
14
—
2.55
Unit
V
V
t_osc
n_osc
ns
t_cyc
V
V
MC9S12E256 Data Sheet, Rev. 1.08
Freescale Semiconductor
571