Datasheet
MC9S08QE8 Series Data Sheet, Rev. 8
Electrical Characteristics
Freescale Semiconductor18
Figure 12. Typical Crystal or Resonator Circuit: High Range and Low Range/High Gain
Figure 13. Typical Crystal or Resonator Circuit: Low Range/Low Power
3.9 Internal Clock Source (ICS) Characteristics
Table 11. ICS Frequency Specifications (Temperature Range = –40 to 85C Ambient)
Num C Characteristic Symbol Min. Typical
1
Max. Unit
1P
Average internal reference frequency — factory trimmed
at V
DD
= 3.6 V and temperature = 25 C
f
int_t
— 32.768 — kHz
2P
Internal reference frequency — user trimmed f
int_ut
31.25 — 39.06 kHz
3T
Internal reference start-up time t
IRST
—510s
4P
DCO output frequency range —
trimmed
2
Low range
(DRS = 00)
f
dco_t
16 — 20 MHz
5P
DCO output frequency
2
Reference = 32768 Hz and DMX32 = 1
f
dco_DMX32
— 19.92 — MHz
6C
Resolution of trimmed DCO output frequency at fixed
voltage and temperature (using FTRIM)
f
dco_res_t
— 0.1 0.2
%f
dco
XOSCVLP
EXTAL XTAL
Crystal or Resonator
R
S
C
2
R
F
C
1
XOSCVLP
EXTAL XTAL
Crystal or Resonator