MC9S08QG8_09 Datasheet, PDF (276/314 Pages) Freescale Semiconductor, Inc – HCS08 Microcontrollers

Appendix A Electrical Characteristics
A.7 External Oscillator (XOSC) and Internal Clock Source (ICS)
Characteristics
Reference Figure A-7 for crystal or resonator circuit.
Table A-8. XOSC and ICS Specifications (Temperature Range = –40 to 125°C Ambient)
Characteristic
Internal reference frequency — factory trimmed at V_DD = 3.6V and
temperature = 25°C
Oscillator crystal or resonator (EREFS = 1, ERCLKEN = 1)
Low range (RANGE = 0)
High range (RANGE = 1) FEE or FBE mode ¹
High range (RANGE = 1), high gain (HGO = 1), FBELP mode
High range (RANGE = 1), low power (HGO = 0), FBELP mode
Load capacitors
Feedback resistor
Low range (32 kHz to 38.4 kHz)
High range (1 MHz to 16 MHz)
Series resistor — Low range
Low Gain (HGO = 0)
High Gain (HGO = 1)
Series resistor — High range
Low Gain (HGO = 0)
High Gain (HGO = 1)
≥ 8 MHz
4 MHz
1 MHz
Crystal start-up time ^{3, 4}
Low range, low power
Low range, high power
High range, low power
High range, high power
Internal reference start-up time
Square wave input clock frequency (EREFS = 0, ERCLKEN = 1)
FEE or FBE mode ²
FBELP mode
Internal reference frequency - untrimmed⁵
Internal reference frequency - trimmed
DCO output frequency range - untrimmed⁵ f_dco= 512 * f_{int_ut}
DCO output frequency range - trimmed
Symbol
f_{int_ft}
f_lo
f_hi
f_hi
f_hi
C₁
C₂
R_F
R_S
R_S
t
CSTL
t
CSTH
t_IRST
f_extal
f_{int_ut}
f_{int_t}
f_{dco_ut}
f_{dco_t}
Min
—
32
1
1
1
—
—
—
—
—
—
—
—
—
—
0.03125
0
25
31.25
12.8
16
Typ
Max
31.25
—
—
38.4
—
5
—
16
—
8
See Note ²
10
1
0
—
100
—
0
0
0
10
0
20
200
—
400
—
5
—
15
—
60
100
—
5
—
20
32.7
41.66
—
39.06
16.8
21.33
—
20
Unit
kHz
kHz
MHz
MHz
MHz
MΩ
MΩ
kΩ
kΩ
ms
μs
MHz
MHz
kHz
kHz
MHz
MHz
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 5
274
Freescale Semiconductor