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5509A ebsr寄存器



请问老师,在做AIC23时发现外扩的MCBSP1和2用不了,找手册发现得设置ebsr寄存器使能MCBSP1和2,但是MCBSP和EMIF似乎是复用的???也就是说我用MCBSP外扩的话,EMIF用不了了。。。那声音传进来就没地方存储!!!请问老师我这样理解对吗???还有,5509A里的EBSR寄存器怎样设定可以使能MCBSP1和2呢???求类似的程序