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MCP2515-I/ST 参数 Datasheet PDF下载

MCP2515-I/ST图片预览
型号: MCP2515-I/ST
PDF下载: 下载PDF文件 查看货源
内容描述: 独立CAN控制器,SPI ™接口 [Stand-Alone CAN Controller With SPI⑩ Interface]
分类和应用: 控制器
文件页数/大小: 84 页 / 993 K
品牌: MICROCHIP [ MICROCHIP ]
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MCP2515  
FIGURE 8-3:  
EXTERNAL SERIES RESONANT CRYSTAL OSCILLATOR CIRCUIT(1)  
To Other  
Devices  
330 kΩ  
330 kΩ  
74AS04  
74AS04  
74AS04  
MCP2510  
OSC1  
0.1 mF  
XTAL  
Note 1: Duty cycle restrictions must be observed (see Table 12-2).  
TABLE 8-1:  
CAPACITOR SELECTION FOR  
CERAMIC RESONATORS  
TABLE 8-2:  
CAPACITOR SELECTION FOR  
CRYSTAL OSCILLATOR  
Typical Capacitor Values Used:  
Typical Capacitor  
Values Tested:  
Osc  
Crystal  
Freq.(2)  
Type(1)(4)  
Mode  
Freq.  
OSC1  
OSC2  
C1  
C2  
HS  
8.0 MHz  
27 pF  
22 pF  
27 pF  
22 pF  
HS  
4 MHz  
8 MHz  
20 MHz  
27 pF  
22 pF  
15 pF  
27 pF  
22 pF  
15 pF  
16.0 MHz  
Capacitor values are for design guidance only:  
These capacitors were tested with the resonators  
listed below for basic start-up and operation. These  
values are not optimized.  
Capacitor values are for design guidance only:  
These capacitors were tested with the crystals listed  
below for basic start-up and operation. These values  
are not optimized.  
Different capacitor values may be required to  
produce acceptable oscillator operation. The user  
should test the performance of the oscillator over the  
expected VDD and temperature range for the  
application.  
Different capacitor values may be required to produce  
acceptable oscillator operation. The user should test  
the performance of the oscillator over the expected  
VDD and temperature range for the application.  
See the notes following Table 8-2 for additional infor-  
mation.  
See the notes following this Table for additional  
information.  
Resonators Used:  
4.0 MHz  
Crystals Used(3)  
:
8.0 MHz  
4.0 MHz  
8.0 MHz  
20.0 MHz  
16.0 MHz  
Note 1: While higher capacitance increases the  
stability of the oscillator, it also increases  
the start-up time.  
2: Since each resonator/crystal has its own  
characteristics, the user should consult  
the resonator/crystal manufacturer for  
appropriate values of external  
components.  
3: RS may be required to avoid overdriving  
crystals with low drive level specification.  
4: Always verify oscillator performance over  
the VDD and temperature range that is  
expected for the application.  
DS21801D-page 54  
Preliminary  
© 2005 Microchip Technology Inc.  
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