Peripheral operating requirements and behaviors
Table 13. MCG specifications (continued)
Symbol Description
Min.
Typ.
Max.
Unit
Notes
fdco_t_DMX3 DCO output
Low range (DRS=00)
732 × ffll_ref
—
23.99
—
MHz
4, 5
frequency
2
Mid range (DRS=01)
1464 × ffll_ref
—
—
—
47.97
71.99
95.98
—
—
—
MHz
MHz
MHz
ps
Mid-high range (DRS=10)
2197 × ffll_ref
High range (DRS=11)
2929 × ffll_ref
Jcyc_fll
FLL period jitter
—
—
180
150
—
—
• fVCO = 48 MHz
• fVCO = 98 MHz
tfll_acquire FLL target frequency acquisition time
—
—
1
ms
6
PLL
fvco
Ipll
VCO operating frequency
48.0
—
—
100
—
MHz
µA
PLL operating current
7
7
1060
• PLL @ 96 MHz (fosc_hi_1 = 8 MHz, fpll_ref
2 MHz, VDIV multiplier = 48)
=
=
Ipll
PLL operating current
—
600
—
—
µA
• PLL @ 48 MHz (fosc_hi_1 = 8 MHz, fpll_ref
2 MHz, VDIV multiplier = 24)
fpll_ref
PLL reference frequency range
2.0
4.0
MHz
Jcyc_pll
PLL period jitter (RMS)
• fvco = 48 MHz
8
8
—
—
120
50
—
—
ps
ps
• fvco = 100 MHz
Jacc_pll
PLL accumulated jitter over 1µs (RMS)
• fvco = 48 MHz
—
—
1350
600
—
—
ps
ps
• fvco = 100 MHz
Dlock
Dunl
Lock entry frequency tolerance
Lock exit frequency tolerance
Lock detector detection time
1.49
4.47
—
—
—
—
2.98
5.97
%
%
s
150 × 10-6
+ 1075(1/
tpll_lock
9
fpll_ref
)
1. This parameter is measured with the internal reference (slow clock) being used as a reference to the FLL (FEI clock
mode).
2. These typical values listed are with the slow internal reference clock (FEI) using factory trim and DMX32=0.
3. The resulting system clock frequencies should not exceed their maximum specified values. The DCO frequency deviation
(Δfdco_t) over voltage and temperature should be considered.
4. These typical values listed are with the slow internal reference clock (FEI) using factory trim and DMX32=1.
5. The resulting clock frequency must not exceed the maximum specified clock frequency of the device.
K51 Sub-Family Data Sheet, Rev. 2, 4/2012.
28
Freescale Semiconductor, Inc.
FREESCALE [ Freescale ]
