Datasheet

Appendix A Electrical Characteristics
MC9S08SH32 Series Data Sheet, Rev. 2
300 Freescale Semiconductor
A.8 External Oscillator (XOSC) Characteristics
Table A-8. Oscillator Electrical Specifications (Temperature Range = –40 to 125°C Ambient)
Num C Rating Symbol Min Typ
1
1
Typical data was characterized at 5.0 V, 25°C or is 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
The input clock source must be divided using RDIV to within the range of 31.25 kHz to 39.0625 kHz.
f
hi
1 — 5 MHz
High range (RANGE = 1, HGO = 1) FBELP mode f
hi-hgo
1 — 16 MHz
High range (RANGE = 1, HGO = 0) FBELP mode f
hi-lp
1 — 8 MHz
2—
Load capacitors
C
1,
C
2
See crystal or resonator
manufacturer’s recommendation.
3—
Feedback resistor
R
F
MΩLow range (32 kHz to 100 kHz) — 10 —
High range (1 MHz to 16 MHz) — 1 —
4—
Series resistor
R
S
kΩ
Low range, low gain (RANGE = 0, HGO = 0) — 0 —
Low range, high gain (RANGE = 0, HGO = 1) — 100 —
High range, low gain (RANGE = 1, HGO = 0) — 0 —
High range, high gain (RANGE = 1, HGO = 1)
≥ 8 MHz — 0 0
4 MHz — 0 10
1 MHz — 0 20
5T
Crystal start-up time
3
3
Characterized and not tested on each device. Proper PC board layout procedures must be followed to achieve specifications.
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)
4
4
4 MHz crystal
t
CSTH-LP
—5—
High range, high gain (RANGE = 1, HGO = 1)
4
t
CSTH-HGO
—20—
6T
Square wave input clock frequency (EREFS = 0, ERCLKEN = 1)
f
extal
FEE or FBE mode
2
0.03125 — 5 MHz
FBELP mode 0 — 40 MHz
MCU
EXTAL XTAL
Crystal or Resonator
R
S
C
2
R
F
C
1
PRELIMINARY