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DLPC3479: DLP3479+DLP4710+DLPA3005

Part Number: DLPC3479
Other Parts Discussed in Thread: DLP4710, DLPA3005,
目前在使用DLP3479+DLP4710+DLPA3005开发光机。遇到一些疑问如下:
1.DLPC3479 目前是通过SPI加载flash图片数据,是否可以通过外挂内存(RAM)的模式加载图片数据?同样如果现有架构下无法实现,能否通过定制改造?
2.我们在调试(DLPC3479+DLP4710+DLPA3005)过程发现,当断开DLPC3479与DLPA3005的spi cs片选时候,DLPC3479貌似初始化完成(HOST_IRQ引脚输出低电平);
当连接上DLPC3479与DLPA3005的spi cs片选时候,DLPC3479貌似初始化失败(HOST_IRQ引脚一直输出高电平);请问这个问题的原因是?