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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  
9.0  
RESET  
The MCP2515 differentiates between two resets:  
1. Hardware Reset – Low on RESET pin.  
2. SPI Reset – Reset via SPI command.  
Both of these resets are functionally equivalent. It is  
important to provide one of these two resets after  
power-up to ensure that the logic and registers are in  
their default state. A hardware reset can be achieved  
automatically by placing an RC on the RESET pin. (see  
Figure 9-1). The values must be such that the device is  
held in reset for a minimum of 2 µs after VDD reaches  
operating voltage, as indicated in the electrical  
specification (tRL).  
FIGURE 9-1:  
RESET PIN CONFIGURATION EXAMPLE  
VDD  
VDD  
D(1)  
R
R1(2)  
RESET  
C
Note 1: The diode D helps discharge the capacitor quickly when VDD powers down.  
2: R1 = 1 kΩ to 10 kΩ will limit any current flowing into RESET from external  
capacitor C, in the event of RESET pin breakdown due to Electrostatic  
Discharge (ESD) or Electrical Overstress (EOS).  
© 2005 Microchip Technology Inc.  
Preliminary  
DS21801D-page 55  
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