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MAX3420E外设控制器的中断系统

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摘要 MAX3420E可与任何SPI主控制器相连,以构成全速USB外设器件。尽管一般都由MAX3420来管理底层USB信令,但是需要处理USB事件时,SPI主控制器必须参与处理。当MAX3420的INT引脚指示有中断发生时,SPI主控制器将读取14个中断请求位,以确定需要服务的中断。一般情况下,主要由这些中断请求(IRQ)位确定MAX3420E的工作过程。在选择器件时,SPI主控制器可以是微控制器、DSP、ASIC或具备SPI端口的其它器件,并应能提供SCLK信号。
出处 《电子元器件应用》 2006年第6期37-39,44,共4页 Electronic Component & Device Applications
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