Datasheet

MC9S08QE128 Series Data Sheet, Rev. 7
Electrical Characteristics
Freescale Semiconductor22
Figure 13. Typical Crystal or Resonator Circuit: High Range and Low Range/High Gain
Figure 14. Typical Crystal or Resonator Circuit: Low Range/Low Gain
3.9 Internal Clock Source (ICS) Characteristics
Table 12. ICS Frequency Specifications (Temperature Range = –40 to 85°C Ambient)
Num C Characteristic Symbol Min Typ
1
Max Unit
1P
Average internal reference frequency — factory trimmed
at V
DD
= 3.6 V and temperature = 25°C
f
int_ft
— 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
—60100μs
4
P
DCO output frequency range —
trimmed
2
Low range (DRS=00)
f
dco_u
16 — 20
MHzP Mid range (DRS=01) 32 — 40
P High range (DRS=10) 48 — 60
5
P
DCO output frequency
2
Reference = 32768 Hz
and
DMX32 = 1
Low range (DRS=00)
f
dco_DMX32
— 19.92 —
MHz
P Mid range (DRS=01) — 39.85 —
P
High range (DRS=10)
—
59.77
—
6C
Resolution of trimmed DCO output frequency at fixed voltage and
temperature (using FTRIM)
Δf
dco_res_t
— ± 0.1 ± 0.2
%f
dco
7C
Resolution of trimmed DCO output frequency at fixed voltage and
temperature (not using FTRIM)
Δf
dco_res_t
— ± 0.2 ± 0.4
%f
dco
XOSC
EXTAL XTAL
Crystal or Resonator
R
S
C
2
R
F
C
1
XOSC
EXTAL XTAL
Crystal or Resonator