MK61FX512VMD12 FREESCALE [Freescale Semiconductor, Inc], MK61FX512VMD12 Datasheet - Page 34

• Manufacturer Part Number: MK61FX512VMD12
• Description: K61 Sub-Family
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Peripheral operating requirements and behaviors
1. Frequencies less than 8 MHz are not in the PLL range.
2. Other frequency limits may apply when external clock is being used as a reference for the FLL or PLL.
3. When transitioning from FBE to FEI mode, restrict the frequency of the input clock so that, when it is divided by FRDIV, it
4. Proper PC board layout procedures must be followed to achieve specifications.
5. 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 32 kHz Oscillator Electrical Characteristics
This section describes the module electrical characteristics.
6.3.3.1 32 kHz oscillator DC electrical specifications
1. When a crystal is being used with the 32 kHz oscillator, the EXTAL32 and XTAL32 pins should only be connected to
34
Symbol
remains within the limits of the DCO input clock frequency.
being set.
required oscillator components and must not be connected to any other devices.
t
cst
Symbol
C
V
V
R
BAT
para
pp
F
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
1
The 32 kHz oscillator works in low power mode bu default and
cannot be moved into high power/gain mode.
Table 17. Oscillator frequency specifications (continued)
Table 18. 32kHz oscillator DC electrical specifications
Supply voltage
Internal feedback resistor
Parasitical capacitance of EXTAL32 and XTAL32
Peak-to-peak amplitude of oscillation
Description
K61 Sub-Family Data Sheet, Rev. 4, 10/2012.
NOTE
Min.
—
—
—
—
1000
1.71
Typ.
500
Min.
0.6
—
—
—
1
Max.
Typ.
100
0.6
—
—
—
—
—
5
Freescale Semiconductor, Inc.
Max.
Unit
3.6
ms
ms
ms
ms
—
—
7
Notes
Unit
4,
MΩ
pF
V
V
5