MC9S08SG8 Datasheet, PDF (284/310 Pages) Freescale Semiconductor, Inc – Microcontrollers

Appendix A Electrical Characteristics
A.8 External Oscillator (XOSC) Characteristics
Table A-8. Oscillator Electrical Specifications (Temperature Range = –40 to 125°C Ambient)
Num C
Rating
Symbol Min
Typ¹
Max Unit
Oscillator crystal or resonator (EREFS = 1, ERCLKEN = 1)
Low range (RANGE = 0)
1T
High range (RANGE = 1) FEE or FBE mode ²
High range (RANGE = 1, HGO = 1) FBELP mode
High range (RANGE = 1, HGO = 0) FBELP mode
2 D Load capacitors
f_lo
f_hi
f_hi-hgo
f_hi-lp
C_1, C₂
32
—
38.4 kHz
1
—
5
MHz
1
—
16 MHz
1
—
8
MHz
See crystal or resonator
manufacturer’s recommendation.
Feedback resistor
3D
Low range (32 kHz to 100 kHz)
High range (1 MHz to 16 MHz)
R_F
10
MΩ
1
MΩ
Series resistor
Low range, low gain (RANGE = 0, HGO = 0)
Low range, high gain (RANGE = 0, HGO = 1)
4D
High range, low gain (RANGE = 1, HGO = 0)
High range, high gain (RANGE = 1, HGO = 1)
≥ 8 MHz
4 MHz
1 MHz
—
0
—
—
100
—
—
0
—
R_S
kΩ
—
0
0
—
0
10
—
0
20
Crystal start-up time ³
Low range, low gain (RANGE = 0, HGO = 0)
5T
Low range, high gain (RANGE = 0, HGO = 1)
High range, low gain (RANGE = 1, HGO = 0)⁴
High range, high gain (RANGE = 1, HGO = 1)⁴
t
CSTL-LP
—
t
CSTL-HGO
—
t
CSTH-LP
—
t
—
CSTH-HGO
200
400
5
TBD
Square wave input clock frequency (EREFS = 0, ERCLKEN = 1)
6T
FEE or FBE mode ²
FBELP mode
f_extal 0.03125 —
0
—
—
—
—
ms
—
5
MHz
40 MHz
1 _{Typical data was characterized at 5.0 V, 25°C or is recommended value.}
2 _{The input clock source must be divided using RDIV to within the range of 31.25 kHz to 39.0625 kHz.}
3 _{This parameter is characterized and not tested on each device. Proper PC board layout procedures must be followed to achieve}
specifications.
4 _{4 MHz crystal}
EXTAL
MCU
XTAL
R_F
R_S
C₁
Crystal or Resonator
C₂
MC9S08SG8 MCU Series Data Sheet, Rev. 0
284
PRELIMINARY
Freescale Semiconductor