Datasheet

Appendix A Electrical Characteristics
MC9S08DZ128 Series Data Sheet, Rev. 1
436 Freescale Semiconductor
A.11 MCG Specifications
Table A-12. MCG Frequency Specifications (Temperature Range = –40 to 125°C Ambient)
Num C Rating Symbol Min Typical Max Unit
1P
Internal reference frequency - factory trimmed at
VDD=5.0V and temperature=25C
f
int_ft
— 31.25 — kHz
2P
Internal reference frequency - untrimmed
1
f
int_ut
25 36 41.66 kHz
3 P Internal reference frequency - user trimmed
f
int_t
31.25 — 39.0625 kHz
4 D Internal reference startup time
t
irefst
— 55 100 us
5
—
DCO output frequency range -
untrimmed
1
Low range (DRS=0,
DMX32=0)
f
dco_ut
= 512X f
int_ut
f
dco_ut
12.8 18.43 21.33
MHz
—
Mid range (DRS=1,
DMX32=0)
f
dco_ut
= 1024 X f
int_ut
25.6 36.86 42.66
6
P
DCO output frequency range -
trimmed
2
Low range (DRS=0,
DMX32=0)
f
dco_ut
= 512X f
int_ut
f
dco_t
16 — 20
MHz
P
Mid range (DRS=1,
DMX32=0)
f
dco_ut
= 1024 X f
int_ut
32 — 40
7C
Resolution of trimmed DCO output frequency at fixed
voltage and temperature (using FTRIM)
Δf
dco_res_t
— ± 0.1 ± 0.2
%f
dco
8C
Resolution of trimmed DCO output frequency at fixed
voltage and temperature (not using FTRIM)
Δf
dco_res_t
— ± 0.2 ± 0.4
%f
dco
9P
Total deviation of trimmed DCO output frequency over
voltage and temperature
Δf
dco_t
—
+ 0.5
-1.0
± 2
%f
dco
10 C
Total deviation of trimmed DCO output frequency over
fixed voltage and temperature range of 0 - 70
°C
Δf
dco_t
— ± 0.5 ± 1
%f
dco
11 C
FLL acquisition time
3
t
fll_acquire
—— 1ms
12 D
PLL acquisition time
4
t
pll_acquire
—— 1ms
13 C
Long term Jitter of DCO output clock (averaged over 2mS
interval)
5
C
Jitter
— 0.02 0.2
%f
dco
14 D VCO operating frequency
f
vco
7.0 — 55.0 MHz
MCU
EXTAL XTAL
Crystal or Resonator
R
S
C
2
R
F
C
1