Appendix A Electrical Characteristics
MC9S12XE-Family Reference Manual Rev. 1.19
Freescale Semiconductor
1237
A.6.2
Oscillator
Table A-24. Oscillator Characteristics
Conditions are shown in Table A-4. unless otherwise noted
Num C
Rating
Symbol
Min
Typ
Max
Unit
1a
C Crystal oscillator range (loop controlled Pierce)
f
OSC
4.0
—
16
MHz
1b
C Crystal oscillator range (full swing Pierce)
1,2
1
Depending on the crystal a damping series resistor might be necessary
2
Only valid if full swing Pierce oscillator/external clock mode is selected
f
OSC
2.0
—
40
MHz
2
P Startup Current
i
OSC
100
—
—
µ
A
3a
C Oscillator start-up time (LCP, 4MHz)
3
3
These values apply for carefully designed PCB layouts with capacitors that match the crystal/resonator requirements..
t
UPOSC
—
2
10
ms
3b
C Oscillator start-up time (LCP, 8MHz)
t
UPOSC
—
1.6
8
ms
3c
C Oscillator start-up time (LCP, 16MHz)
t
UPOSC
—
1
5
ms
4a
C Oscillator start-up time (full swing Pierce, 2MHz)
t
UPOSC
—
8
40
ms
4b
C Oscillator start-up time (full swing Pierce, 4MHz)
t
UPOSC
—
4
20
ms
4c
C Oscillator start-up time (full swing Pierce, 8MHz)
t
UPOSC
—
2
10
ms
4d
C Oscillator start-up time (full swing Pierce, 16MHz)
t
UPOSC
—
1
5
ms
4e
C Oscillator start-up time (full swing Pierce, 40MHz)
t
UPOSC
—
0.8
4
ms
5
D Clock Quality check time-out
t
CQOUT
0.45
—
2.5
s
6
P Clock Monitor Failure Assert Frequency
f
CMFA
200
400
1000
KHz
7
P External square wave input frequency
f
EXT
2.0
—
50
MHz
8
D External square wave pulse width low
t
EXTL
9.5
—
—
ns
9
D External square wave pulse width high
t
EXTH
9.5
—
—
ns
10
D External square wave rise time
t
EXTR
—
—
1
ns
11
D External square wave fall time
t
EXTF
—
—
1
ns
12
D Input Capacitance (EXTAL, XTAL pins)
C
IN
—
7
—
pF
13
P EXTAL Pin Input High Voltage
V
IH,EXTAL
0.75*V
DDPLL
—
—
V
T EXTAL Pin Input High Voltage
4
Only applies if EXTAL is externally driven
V
IH,EXTAL
—
—
V
DDPLL
+ 0.3
V
14
P EXTAL Pin Input Low Voltage
V
IL,EXTAL
—
—
0.25*V
DDPLL
V
T
EXTAL Pin Input Low Voltage
V
IL,EXTAL
V
SSPLL
- 0.3
—
—
V
15
C EXTAL Pin Input Hysteresis
V
HYS,EXTAL
—
180
—
mV
16
C
EXTAL Pin oscillation amplitude (loop controlled
Pierce)
V
PP,EXTAL
—
0.9
—
V
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
S12XE
products
in
208
MAPBGA
packages