參數(shù)資料
型號： MK20DX256ZVLQ10
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, FLASH, 100 MHz, RISC MICROCONTROLLER, PQFP144
封裝： 20 X 20 MM, LQFP-144
文件頁數(shù)： 27/74頁
文件大?。?/td> 1023K
代理商： MK20DX256ZVLQ10
Table 17. Oscillator frequency specifications (continued)
Symbol
Description
Min.
Typ.
Max.
Unit
Notes
fosc_hi_1
Oscillator crystal or resonator frequency — high
frequency mode (low range)
(MCG_C2[RANGE]=01)
3
—
8
MHz
fosc_hi_2
Oscillator crystal or resonator frequency — high
frequency mode (high range)
(MCG_C2[RANGE]=1x)
8
—
32
MHz
fec_extal
Input clock frequency (external clock mode)
—
50
MHz
tdc_extal
Input clock duty cycle (external clock mode)
40
50
60
%
tcst
Crystal startup time — 32 kHz low-frequency,
low-power mode (HGO=0)
—
750
—
ms
2, 3
Crystal startup time — 32 kHz low-frequency,
high-gain mode (HGO=1)
—
250
—
ms
Crystal startup time — 8 MHz high-frequency
(MCG_C2[RANGE]=01), low-power mode
(HGO=0)
—
0.6
—
ms
Crystal startup time — 8 MHz high-frequency
(MCG_C2[RANGE]=01), high-gain mode
(HGO=1)
—
1
—
ms
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
being set.
6.3.3 32kHz Oscillator Electrical Characteristics
This section describes the module electrical characteristics.
6.3.3.1 32kHz oscillator DC electrical specifications
Table 18. 32kHz oscillator DC electrical specifications
Symbol
Description
Min.
Typ.
Max.
Unit
VBAT
Supply voltage
1.71
—
3.6
V
RF
Internal feedback resistor
—
100
—
MΩ
Cpara
Parasitical capacitance of EXTAL32 and XTAL32
—
2.5
—
pF
Cload
Internal load capacitance (programmable)
—
15
—
pF
Vpp1
Peak-to-peak amplitude of oscillation
—
0.6
—
V
1. The EXTAL32 and XTAL32 pins should only be connected to required oscillator components and must not be connected to
any other devices.
Peripheral operating requirements and behaviors
K20 Sub-Family Data Sheet Data Sheet, Rev. 5, 5/2011.
Freescale Semiconductor, Inc.
Preliminary
33
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