Datasheet

Appendix A Electrical Characteristics
MC9S08EL32 Series and MC9S08SL16 Series Data Sheet, Rev. 3
342 Freescale Semiconductor
A.9 Internal Clock Source (ICS) Characteristics
5T
Crystal start-up time
3
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
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
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
Characterized and not tested on each device. Proper PC board layout procedures must be followed to achieve specifications.
4
4 MHz crystal
Table A-9. ICS Frequency Specifications
(Temperature Range = –40 to 125°C Ambient)
Num C Rating Symbol Min Typical Max Unit
1P
Internal reference frequency — factory trimmed at V
DD
= 5 V and temperature = 25°C
f
int_ft
— 31.25 — kHz
2T
Internal reference frequency — untrimmed
1
f
int_ut
25 36 41.66 kHz
3 P Internal reference frequency — trimmed
f
int_t
31.25 — 39.0625 kHz
4 D Internal reference startup time
t
irefst
—55100μs
5—
DCO output frequency range — untrimmed
1
value
provided for reference: f
dco_ut
= 1024 x f
int_ut
f
dco_ut
25.6 36.86 42.66 MHz
6 D DCO output frequency range — trimmed
f
dco_t
32 — 40 MHz
7D
Resolution of trimmed DCO output frequency at fixed
voltage and temperature (using FTRIM)
Δf
dco_res_t
— ± 0.1 ± 0.2
%f
dco
8D
Resolution of trimmed DCO output frequency at fixed
voltage and temperature (not using FTRIM)
Δf
dco_res_t
— ± 0.2 ± 0.4
%f
dco
Table A-8. Oscillator Electrical Specifications
(Temperature Range = –40 to 125°C Ambient) (continued)
Num C Rating Symbol Min Typ
1
Max Unit
MCU
EXTAL XTAL
Crystal or Resonator
R
S
C
2
R
F
C
1