参数资料
型号: MC56F8014VFAE
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 数字信号处理
英文描述: 0-BIT, 8 MHz, OTHER DSP, PQFP32
封装: ROHS COMPLIANT, PLASTIC, LQFP-32
文件页数: 3/124页
文件大小: 1681K
代理商: MC56F8014VFAE
56F8014 Technical Data, Rev. 11
100
Freescale Semiconductor
10.5 External Clock Operation Timing
Figure 10-4 External Clock Timing
10.6 Phase Locked Loop Timing
Table 10-10 External Clock Operation Timing Requirements1
1. Parameters listed are guaranteed by design.
Characteristic
Symbol
Min
Typ
Max
Unit
Frequency of operation (external clock driver)2
2. See Figure 10-4 for details on using the recommended connection of an external clock driver.
fosc
48
8
MHz
Clock Pulse Width3
3. The high or low pulse width must be no smaller than 6.25ns or the chip may not function.
tPW
6.25
ns
External Clock Input Rise Time4
4. External clock input rise time is measured from 10% to 90%.
trise
——
3
ns
External Clock Input Fall Time5
5. External clock input fall time is measured from 90% to 10%.
tfall
——
3
ns
Table 10-11 PLL Timing
Characteristic
Symbol
Min
Typ
Max
Unit
Internal reference relaxation oscillator frequency for
the PLL
frosc
—8—
MHz
PLL output frequency1 (24 x reference frequency)
1. The core system clock will operate at 1/6 of the PLL output frequency.
fop
—192
MHz
PLL lock time2
2. This is the time required after the PLL is enabled to ensure reliable operation.
tlock
40
100
s
Cycle to cycle jitter
tjitterpll
350
ps
External
Clock
VIH
VIL
Note: The midpoint is VIL + (VIH – VIL)/2.
90%
50%
10%
90%
50%
10%
tPW
tfall
trise
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