Datasheet
Appendix A Electrical Characteristics
MC9S08DZ128 Series Data Sheet, Rev. 1
Freescale Semiconductor 435
A.10 External Oscillator (XOSC) Characteristics
Table A-11. Oscillator Electrical Specifications (Temperature Range = –40 to 125°C Ambient)
Num C Rating Symbol Min Typ
1
1
Data in Typical column was characterized at 3.0 V, 25°C or is typical recommended value.
Max Unit
1C
Oscillator crystal or resonator (EREFS = 1, ERCLKEN = 1)
Low range (RANGE = 0)
f
lo
32 — 38.4 kHz
High range (RANGE = 1) FEE or FBE mode
2
2
When MCG is configured for FEE or FBE mode, input clock source must be divisible using RDIV to within the range of 31.25
kHz to 39.0625 kHz.
f
hi-fll
1 — 5 MHz
High range (RANGE = 1) PEE or PBE mode
3
3
When MCG is configured for PEE or PBE mode, input clock source must be divisible using RDIV to within the range of 1 MHz
to 2 MHz.
f
hi-pll
1 — 16 MHz
High range (RANGE = 1, HGO = 1) BLPE mode
f
hi-hgo
1 — 16 MHz
High range (RANGE = 1, HGO = 0) BLPE mode
f
hi-lp
1 — 8 MHz
2
–
Load capacitors
C
1
C
2
See crystal or resonator
manufacturer’s recommendation.
3
–
Feedback resistor
Low range (32 kHz to 38.4 kHz)
High range (1 MHz to 16 MHz)
R
F
—
—
10
1
—
—
MΩ
MΩ
4
–
Series resistor
Low range, low gain (RANGE = 0, HGO = 0)
Low range, high gain (RANGE = 0, HGO = 1)
High range, low gain (RANGE = 1, HGO = 0)
R
S
—
—
—
0
100
0
—
—
—
kΩ
High range, high gain (RANGE = 1, HGO = 1)
≥ 8 MHz
4 MHz
1 MHz
—
—
—
0
0
0
0
10
20
5T
Crystal start-up time
4
4
This parameter is characterized and not tested on each device. Proper PC board layout procedures must be followed to achieve
specifications. This data varies based on crystal manufacturer and board design. The crystal should be characterized by the
crystal manufacturer.
ms
Low range, low gain (RANGE = 0, HGO = 0)
t
CSTL-LP
— 200 —
Low range, high gain (RANGE = 0, HGO = 1)
t
CSTL-HGO
— 400 —
High range, low gain (RANGE = 1, HGO = 0)
5
5
4 MHz crystal
t
CSTH-LP
—5—
High range, high gain (RANGE = 1, HGO = 1)
5
t
CSTH-HGO
—20—
6T
Square wave input clock frequency (EREFS = 0, ERCLKEN = 1)
f
extal
MHz
FEE or FBE mode
2
0.03125 — 5
PEE or PBE mode
3
1—16
BLPE mode 0 — 40