参数资料
型号: MC56F8122VFAE
厂商: Freescale Semiconductor
文件页数: 15/136页
文件大小: 0K
描述: IC DSP 16BIT 40MHZ 48-LQFP
标准包装: 250
系列: 56F8xxx
核心处理器: 56800E
芯体尺寸: 16-位
速度: 40MHz
连通性: SCI,SPI
外围设备: POR,WDT
输入/输出数: 21
程序存储器容量: 32KB(16K x 16)
程序存储器类型: 闪存
RAM 容量: 4K x 16
电压 - 电源 (Vcc/Vdd): 2.25 V ~ 3.6 V
数据转换器: A/D 6x12b
振荡器型: 内部
工作温度: -40°C ~ 105°C
封装/外壳: 48-LQFP
包装: 托盘
产品目录页面: 734 (CN2011-ZH PDF)
External Clock Operation Timing
56F8322 Technical Data, Rev. 16
Freescale Semiconductor
111
Preliminary
10.5 External Clock Operation Timing
Figure 10-3 External Clock Timing
10.6 Phase Locked Loop Timing
Table 10-13 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—56F8322
2. See Figure 10-3 for details on using the recommended connection of an external clock driver.
fosc
0
120
MHz
Frequency of operation (external clock driver)2—56F8122
fosc
0—
80
MHz
Clock Pulse Width3
3. The high or low pulse width must be no smaller than 8.0ns or the chip will not function.
tPW
3.0
ns
External clock input rise time4
4. External clock input rise time is measured from 10% to 90%.
trise
15
ns
External clock input fall time5
5. External clock input fall time is measured from 90% to 10%.
tfall
15
ns
Table 10-14 PLL Timing
Characteristic
Symbol
Min
Typ
Max
Unit
External reference crystal frequency for the PLL1
1. An externally supplied reference clock should be as free as possible from any phase jitter for the PLL to work
correctly. The PLL is optimized for 8MHz input crystal.
fosc
48
8.4
MHz
PLL output frequency2 (fOUT)—56F8322
2. ZCLK may not exceed 60MHz. For additional information on ZCLK and (fOUT/2), please refer to the OCCS chapter in the
56F8300 Peripheral User Manual.
fop
160
260
MHz
PLL output frequency2 (fOUT)—56F8122
fop
160
160
MHz
PLL stabilization time3 -40
° to +125°C
3. This is the minimum time required after the PLL set up is changed to ensure reliable operation.
tplls
—1
10
ms
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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