参数资料
型号: MCF51QF128VLF
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: FLASH, 50 MHz, MICROCONTROLLER, PQFP48
封装: 7 X 7 MM, LQFP-48
文件页数: 18/72页
文件大小: 1031K
代理商: MCF51QF128VLF
Table 15. Oscillator DC electrical specifications (continued)
Symbol
Description
Min.
Typ.
Max.
Unit
Notes
Vpp5
Peak-to-peak amplitude of oscillation (oscillator
mode) — low-frequency, low-power mode
(HGO=0)
0.6
V
Peak-to-peak amplitude of oscillation (oscillator
mode) — low-frequency, high-gain mode
(HGO=1)
VDD
V
Peak-to-peak amplitude of oscillation (oscillator
mode) — high-frequency, low-power mode
(HGO=0)
0.6
V
Peak-to-peak amplitude of oscillation (oscillator
mode) — high-frequency, high-gain mode
(HGO=1)
VDD
V
1. VDD=3.3 V, Temperature =25 °C
2. See crystal or resonator manufacturer's recommendation
3. Cx,Cy can be provided by using either the integrated capacitors or by using external components.
4. When low power mode is selected, RF is integrated and must not be attached externally.
5. The EXTAL and XTAL pins should only be connected to required oscillator components and must not be connected to any
other devices.
6.3.2.2 Oscillator frequency specifications
Table 16. Oscillator frequency specifications
Symbol
Description
Min.
Typ.
Max.
Unit
Notes
fosc_lo
Oscillator crystal or resonator frequency — low
frequency mode (MCG_C2[RANGE]=00)
32
40
kHz
fosc_hi_1
Oscillator crystal or resonator frequency — high
frequency mode (low range)
(MCG_C2[RANGE]=01)
1
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
1, 2
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
3, 4
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. When transitioning from FBE to FEI mode, restrict the frequency of the input clock so that, when it is divided by FRDIV, it
remains within the limits of the DCO input clock frequency.
Clock modules
MCF51JF128 Advance Information Data Sheet, Rev. 3, 08/2011.
Freescale Semiconductor, Inc.
Preliminary
25
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