Datasheet

J14
J13
TCLK
TRST
Figure 8. TRST timing
6.2 System modules
There are no specifications necessary for the device's system modules.
6.3 Clock modules
6.3.1 MCG specifications
Table 15. MCG specifications
Symbol Description Min. Typ. Max. Unit Notes
f
ints_ft
Internal reference frequency (slow clock) —
factory trimmed at nominal VDD and 25 °C
— 32.768 — kHz
f
ints_t
Internal reference frequency (slow clock) — user
trimmed — over fixed voltage and temperature
range of 0–70°C
31.25 — 38.2 kHz
Δ
fdco_res_t
Resolution of trimmed average DCO output
frequency at fixed voltage and temperature —
using SCTRIM and SCFTRIM
— ± 0.3 ± 0.6 %f
dco
1
Δf
dco_t
Total deviation of trimmed average DCO output
frequency over fixed voltage and temperature
range of 0–70°C
— ± 1.5 ± 4.5 %f
dco
1
f
intf_ft
Internal reference frequency (fast clock) —
factory trimmed at nominal VDD and 25°C
— 4 — MHz
f
intf_t
Internal reference frequency (fast clock) — user
trimmed at nominal VDD and 25 °C
3 — 5 MHz
f
loc_low
Loss of external clock minimum frequency —
RANGE = 00
(3/5) x
f
ints_t
— — kHz
f
loc_high
Loss of external clock minimum frequency —
RANGE = 01, 10, or 11
(16/5) x
f
ints_t
— — kHz
FLL
f
fll_ref
FLL reference frequency range 31.25 — 39.0625 kHz
Table continues on the next page...
Peripheral operating requirements and behaviors
K20 Sub-Family Data Sheet Data Sheet, Rev. 7, 02/2013.
28 Freescale Semiconductor, Inc.