mk50n512cmc100 Freescale Semiconductor, Inc, mk50n512cmc100 Datasheet - Page 29

• Manufacturer Part Number: mk50n512cmc100
• Description: Arm Cortex-m4 Core With Dsp K50 Sub-family Data Sheet
• Manufacturer: Freescale Semiconductor, Inc

5. The EXTAL and XTAL pins should only be connected to required oscillator components and must not be connected to any
6.3.2.2 Oscillator frequency specifications
1. Other frequency limits may apply when external clock is being used as a reference for the FLL or PLL
2. Proper PC board layout procedures must be followed to achieve specifications.
3. Crystal startup time is defined as the time between the oscillator being enabled and the OSCINIT bit in the MCG_S register
6.3.3 32kHz Oscillator Electrical Characteristics
This section describes the module electrical characteristics.
6.3.3.1 32kHz oscillator DC electrical specifications
Freescale Semiconductor, Inc.
Symbol
f
f
f
t
Symbol
osc_hi_1
osc_hi_2
ec_extal
dc_extal
f
other devices.
being set.
osc_lo
C
V
t
cst
R
BAT
para
F
Oscillator crystal or resonator frequency — low
frequency mode (MCG_C2[RANGE]=00)
Oscillator crystal or resonator frequency — high
frequency mode (low range)
(MCG_C2[RANGE]=01)
Oscillator crystal or resonator frequency — high
frequency mode (high range)
(MCG_C2[RANGE]=1x)
Input clock frequency (external clock mode)
Input clock duty cycle (external clock mode)
Crystal startup time — 32 kHz low-frequency,
low-power mode (HGO=0)
Crystal startup time — 32 kHz low-frequency,
high-gain mode (HGO=1)
Crystal startup time — 8 MHz high-frequency
(MCG_C2[RANGE]=01), low-power mode
(HGO=0)
Crystal startup time — 8 MHz high-frequency
(MCG_C2[RANGE]=01), high-gain mode
(HGO=1)
Description
Supply voltage
Internal feedback resistor
Parasitical capacitance of EXTAL32 and XTAL32
Description
Table 16. 32kHz oscillator DC electrical specifications
K50 Sub-Family Data Sheet Data Sheet, Rev. 4, 3/2011.
Table 15. Oscillator frequency specifications
Table continues on the next page...
Preliminary
Min.
32
40
—
—
—
—
—
3
8
Peripheral operating requirements and behaviors
1.71
Min.
—
—
TBD
Typ.
800
50
—
—
—
—
4
3
Typ.
100
2.5
—
Max.
40
32
50
60
—
—
—
—
8
Max.
MHz
MHz
MHz
Unit
kHz
3.6
ms
ms
ms
ms
—
—
%
Notes
2,
Unit
MΩ
1
pF
V
3
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