Peripheral operating requirements and behaviors
6.3.1 MCG specifications
Table 13. MCG specifications
Symbol
f
ints_ft
f
ints_t
Δ
fdco_res_t
Description
Internal reference frequency (slow clock) —
factory trimmed at nominal VDD and 25 °C
Internal reference frequency (slow clock) — user
trimmed
Resolution of trimmed average DCO output
frequency at fixed voltage and temperature —
using SCTRIM and SCFTRIM
Resolution of trimmed average DCO output
frequency at fixed voltage and temperature —
using SCTRIM only
Total deviation of trimmed average DCO output
frequency over voltage and temperature
Total deviation of trimmed average DCO output
frequency over fixed voltage and temperature
range of 0–70°C
Internal reference frequency (fast clock) —
factory trimmed at nominal VDD and 25°C
Internal reference frequency (fast clock) — user
trimmed at nominal VDD and 25 °C
Loss of external clock minimum frequency —
RANGE = 00
Loss of external clock minimum frequency —
RANGE = 01, 10, or 11
FLL
f
fll_ref
f
dco
FLL reference frequency range
DCO output
frequency range
Low range (DRS=00)
640 × f
fll_ref
Mid range (DRS=01)
1280 × f
fll_ref
Mid-high range (DRS=10)
1920 × f
fll_ref
High range (DRS=11)
2560 × f
fll_ref
Table continues on the next page...
80
83.89
100
MHz
60
62.91
75
MHz
40
41.94
50
MHz
31.25
20
—
20.97
39.0625
25
kHz
MHz
Min.
—
31.25
—
Typ.
32.768
—
± 0.3
Max.
—
39.0625
± 0.6
Unit
kHz
kHz
%f
dco
Notes
Δf
dco_res_t
—
± 0.2
± 0.5
%f
dco
Δf
dco_t
Δf
dco_t
—
—
+0.5/-0.7
—
%f
dco
%f
dco
f
intf_ft
f
intf_t
f
loc_low
f
loc_high
—
3
(3/5) x
f
ints_t
(16/5) x
f
ints_t
4
—
—
—
—
5
—
—
MHz
MHz
kHz
kHz
K51 Sub-Family Data Sheet, Rev. 2, 4/2012.
Freescale Semiconductor, Inc.
27
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
