Datasheet

4. Crystal startup time is defined as the time between the oscillator being enabled and the OSCINIT bit in the MCG_S register
being set.
NOTE
The 32 kHz oscillator works in low power mode by default and
cannot be moved into high power/gain mode.
6.3.3 32 kHz Oscillator Electrical Characteristics
This section describes the module electrical characteristics.
6.3.3.1 32 kHz oscillator DC electrical specifications
Table 18. 32kHz oscillator DC electrical specifications
Symbol Description Min. Typ. Max. Unit
V
BAT
Supply voltage 1.71 — 3.6 V
R
F
Internal feedback resistor — 100 — MΩ
C
para
Parasitical capacitance of EXTAL32 and XTAL32 — 5 7 pF
V
pp
1
Peak-to-peak amplitude of oscillation — 0.6 — V
1. When a crystal is being used with the 32 kHz oscillator, the EXTAL32 and XTAL32 pins should only be connected to
required oscillator components and must not be connected to any other devices.
6.3.3.2 32 kHz oscillator frequency specifications
Table 19. 32 kHz oscillator frequency specifications
Symbol Description Min. Typ. Max. Unit Notes
f
osc_lo
Oscillator crystal — 32.768 — kHz
t
start
Crystal start-up time — 1000 — ms 1
f
ec_extal32
Externally provided input clock frequency — 32.768 — kHz 2
v
ec_extal32
Externally provided input clock amplitude 700 — V
BAT
mV 2, 3
1. Proper PC board layout procedures must be followed to achieve specifications.
2. This specification is for an externally supplied clock driven to EXTAL32 and does not apply to any other clock input. The
oscillator remains enabled and XTAL32 must be left unconnected.
3. The parameter specified is a peak-to-peak value and V
IH
and V
IL
specifications do not apply. The voltage of the applied
clock must be within the range of V
SS
to V
BAT
.
6.4 Memories and memory interfaces
Peripheral operating requirements and behaviors
K60 Sub-Family Data Sheet Data Sheet, Rev. 7, 02/2013.
32 Freescale Semiconductor, Inc.