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56F8036_10 参数 Datasheet PDF下载

56F8036_10图片预览
型号: 56F8036_10
PDF下载: 下载PDF文件 查看货源
内容描述: 16位数字信号控制器 [16-bit Digital Signal Controllers]
分类和应用: 控制器
文件页数/大小: 164 页 / 893 K
品牌: FREESCALE [ Freescale ]
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Ceramic Resonator  
Crystal Frequency = 4 - 8MHz (optimized for 8MHz)  
EXTAL XTAL  
Rz  
EXTAL XTAL  
Rz  
Sample External Crystal Parameters:  
Rz = 750 KΩ  
Note: If the operating temperature range is limited to  
below 85oC (105oC junction), then Rz = 10 Meg Ω  
CL1  
CL2  
Figure 3-1 External Crystal Oscillator Circuit  
3.6 Ceramic Resonator  
The internal crystal oscillator circuit is also designed to interface with a ceramic resonator in the frequency  
range of 4-8MHz. Figure 3-2 shows the typical 2 and 3 terminal ceramic resonators and their circuits.  
Follow the resonator suppliers recommendations when selecting a resonator, since their parameters  
determine the component values required to provide maximum stability and reliable start up. The load  
capacitance values used in the resonator circuit design should include all stray layout capacitances. The  
resonator and associated components should be mounted as close as possible to the EXTAL and XTAL  
pins to minimize output distortion and start-up stabilization time.  
Resonator Frequency = 4 - 8MHz (optimized for 8MHz)  
3 Terminal  
2 Terminal  
EXTAL XTAL  
Rz  
Sample External Ceramic Resonator Parameters:  
Rz = 750 KΩ  
EXTAL XTAL  
Rz  
CL1  
CL2  
C1  
C2  
Figure 3-2 External Ceramic Resonator Circuit  
3.7 External Clock Input - Crystal Oscillator Option  
The recommended method of connecting an external clock is illustrated in Figure 3-3. The external clock  
source is connected to XTAL and the EXTAL pin is grounded. The external clock input must be generated  
using a relatively low impedance driver.  
56F8036 Data Sheet, Rev. 6  
Freescale Semiconductor  
35  
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