As the title , There are still several problems
①CE and CS What's the difference between the two pins ？
② Is it up to you to decide which pins to connect to the external chip ？
CSDN Q & A 2022-05-15 04:45:42 阅读数:658
As the title , There are still several problems
①CE and CS What's the difference between the two pins ？
② Is it up to you to decide which pins to connect to the external chip ？
According to the standard bus connection method , Of course 138 Another decoded signal , In this way, you can directly access , use P2 Words , It's troublesome to operate , Add one more instruction .
① Almost
② It depends on the pin function of the chip , System functional requirements , There are also some distribution principles in practical use （ For example, address division ）
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