Freescale Semiconductor MC9S12XDP512 Table A-21. Oscillator Characteristics

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) fOSC 4.0 — 16 MHz
1b C Crystal oscillator range (full swing Pierce)1, 2
1Depending on the crystal a damping series resistor might be necessary
2XCLKS = 0
fOSC 0.5 — 40 MHz
2 P Startup current iOSC 100 — — µA
3 C Oscillator start-up time (loop controlled Pierce) tUPOSC ——
3
3fosc = 4 MHz, C = 22 pF.
504
4Maximum value is for extreme cases using high Q, low frequency crystals
ms
4 D Clock quality check time-out tCQOUT 0.45 2.5 s
5 P Clock monitor failure assert frequency fCMFA 50 100 200 KHz
6 P External square wave input frequency fEXT 0.5 — 80 MHz
7 D External square wave pulse width low tEXTL 5——ns
8 D External square wave pulse width high tEXTH 5——ns
9 D External square wave rise time tEXTR —— 1ns
10 D External square wave fall time tEXTF —— 1ns
11 D Input capacitance (EXTAL, XTAL inputs) CIN —7—pF
12 P EXTAL pin input high voltage5
5If full swing Pierce oscillator/external clock circuitry is used. (XCLKS = 0)
VIH,EXTAL 0.75*
VDDPLL
——V
T EXTAL pin input high voltage5VIH,EXTAL —— V
DDPLL +
0.3
V
13 P EXTAL pin input low voltage5VIL,EXTAL — — 0.25*
VDDPLL
V
T EXTAL pin input low voltage5VIL,EXTAL VSSPLL –
0.3
——V
14 C EXTAL pin input hysteresis5VHYS,EXTAL — 250 — mV