This topic, please-CodePudding

Q 5, how to choose the CPU,,,

With the title, or fixed?

CodePudding user response:

Thank invited,
Topic not ask how to choose the CPU, is to ask how to use the CPU address line to access the module board, the first (5) the answer is clear,

CodePudding user response:

reference 1st floor all ling rat man replies:

thank invited,
Not ask how to choose the CPU, is to ask how to use the CPU address line to access the module board, the first (5) the answer is clear,

Well, that's the top three, second three is how to come out?

CodePudding user response:

refer to the second floor I was so afraid QAQ response:

Quote: refer to 1st floor all ling rat man replies:
thank invited,
Not ask how to choose the CPU, is to ask how to use the CPU address line to access the module board, the first (5) the answer is clear,

Well, that's the top three, second three is how to come out?

Whatever address line a few root, from which to draw N lines, can access module board is 2 ^ N, the rest of the line access module, chip from the rest of the row M wire, accessible chip number is 2 ^ M, you use this method to pour a push,

CodePudding user response:

references are ling rat spiderman 3 floor response:

Quote: refer to the second floor and I was so afraid QAQ response:

Quote: refer to 1st floor all ling rat man replies:
thank invited,
Not ask how to choose the CPU, is to ask how to use the CPU address line to access the module board, the first (5) the answer is clear,

Well, that's the top three, second three is how to come out?

Whatever address line a few root, from which to draw N lines, can access module board is 2 ^ N, the rest of the line access module, chip from the rest of the row M wire, accessible chip number is 2 ^ M, you use this method to pour a push,

I see, uh huh, N=3, M not asked, and,

CodePudding user response:

Template block=8 total=2 ^ 3, which is three to cover template number represents the address information of
Because be 8-bit, only four chips, so use two pieces of eight chipset synthesis, such as A chip is responsible for the high four, four B chip is responsible for the low, so it can from 8 is the result of the conversion to distinguish A chip B chips (such as B, is A scale of 0-127 to 128-255 is A), so the 32 k/4 k=8=2 ^ 3, with three can cover the chip number represents the address information

CodePudding user response:

The rest is the 18-3-3=12, used to distinguish the inside address