MK20DX64VFT5 Freescale Semiconductor, MK20DX64VFT5 Datasheet - Page 29

• Manufacturer Part Number: MK20DX64VFT5
• Description: ARM Microcontrollers - MCU Kinetis 64K Flex
• Manufacturer: Freescale Semiconductor

Specifications of MK20DX64VFT5

• Rohs: yes
• Core: ARM Cortex M4
• Processor Series: K20P32M50SF0
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 50 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 16 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 1.71 V to 3.6 V
• Operating Temperature Range: - 40 C to + 105 C
• Package / Case: QFN-48
• Mounting Style: SMD/SMT

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. When transitioning from FBE to FEI mode, restrict the frequency of the input clock so that, when it is divided by FRDIV, it
3. Proper PC board layout procedures must be followed to achieve specifications.
4. 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
Freescale Semiconductor, Inc.
Symbol
f
f
f
t
Symbol
osc_hi_1
osc_hi_2
ec_extal
dc_extal
f
other devices.
remains within the limits of the DCO input clock frequency.
being set.
osc_lo
V
t
cst
R
BAT
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
Description
Table 16. 32kHz oscillator DC electrical specifications
Table 15. Oscillator frequency specifications
K20 Sub-Family Data Sheet, Rev. 4 5/2012.
Table continues on the next page...
Min.
32
40
—
—
—
—
—
3
8
Peripheral operating requirements and behaviors
1.71
Min.
—
Typ.
750
250
0.6
50
—
—
—
—
1
Typ.
100
—
Max.
40
32
50
60
—
—
—
—
8
Max.
MHz
MHz
MHz
Unit
kHz
3.6
ms
ms
ms
ms
—
%
Notes
1,
3,
Unit
MΩ
V
2
4
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