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Appendix A Electrical Characteristics
MC9S12XDP512 Data Sheet, Rev. 2.11
946 Freescale Semiconductor
Table A-21. 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
XCLKS = 0
f
OSC
0.5 — 40 MHz
2 P Startup current i
OSC
100 — — µA
3 C Oscillator start-up time (loop controlled Pierce) t
UPOSC
——
3
3
f
osc
= 4 MHz, C = 22 pF.
50
4
4
Maximum value is for extreme cases using high Q, low frequency crystals
ms
4 D Clock quality check time-out t
CQOUT
0.45 2.5 s
5 P Clock monitor failure assert frequency f
CMFA
50 100 200 KHz
6 P External square wave input frequency f
EXT
0.5 — 80 MHz
7 D External square wave pulse width low t
EXTL
5——ns
8 D External square wave pulse width high t
EXTH
5——ns
9 D External square wave rise time t
EXTR
—— 1ns
10 D External square wave fall time t
EXTF
—— 1ns
11 D Input capacitance (EXTAL, XTAL inputs) C
IN
—7—pF
12 P EXTAL pin input high voltage
5
5
If full swing Pierce oscillator/external clock circuitry is used. (XCLKS = 0)
V
IH,EXTAL
0.75*
V
DDPLL
——V
T EXTAL pin input high voltage
5
V
IH,EXTAL
—— V
DDPLL
+
0.3
V
13 P EXTAL pin input low voltage
5
V
IL,EXTAL
— — 0.25*
V
DDPLL
V
T EXTAL pin input low voltage
5
V
IL,EXTAL
V
SSPLL
–
0.3
——V
14 C EXTAL pin input hysteresis
5
V
HYS,EXTAL
— 250 — mV