Datasheet

Appendix A Electrical Characteristics
Freescale Semiconductor MC9S12C-Family / MC9S12GC-Family 665
Rev 01.24
Table A-16. 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 (Colpitts) f
OSC
0.5 — 16 MHz
1b C Crystal oscillator range (Pierce)
(1) 4
1. Depending on the crystal a damping series resistor might be necessary
f
OSC
0.5 — 40 MHz
2 P Startup Current i
OSC
100 — — µA
3 C Oscillator start-up time (Colpitts) t
UPOSC
—8
(2)
2. f
osc
= 4MHz, C = 22pF.
100
(3)
3. 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
(4)
4. Only valid if Pierce Oscillator/external clock selected (XCLKS = 0 during reset)
f
EXT
0.5 — 50 MHz
7 D External square wave pulse width low t
EXTL
9.5 — — ns
8 D External square wave pulse width high t
EXTH
9.5 — — 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 pins) C
IN
—7—pF
12 C
DC Operating Bias in Colpitts Configuration
on EXTAL Pin
V
DCBIAS
— 1.1 — V
13 P
EXTAL Pin Input High Voltage
4
V
IH,EXTAL
0.75*
V
DDPLL
——V
T EXTAL Pin Input High Voltage
4
V
IH,EXTAL
——V
DDPLL
+0.3 V
14 P
EXTAL Pin Input Low Voltage
4
V
Il,EXTAL
——
0.25*
V
DDPLL
V
T EXTAL Pin Input Low Voltage
4
V
Il,EXTAL
V
SSPLL
-0.3 — — V
15 C EXTAL Pin Input Hysteresis
4
V
HYS,EXTAL
— 250 — mV