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Calculation of storage capacity and address space

2022-07-22 08:27:00 【Crazy Alex】

such as , Tell you something FLASH storage capacity 8MB, The address space range is m~0xFFFFFFFF, Give way to beg m

Figure out first. 8M Corresponding 16 Hexadecimal number , Memory is addressed by bytes ,8MB=810241024Byte=2^20*8
=16^5 * 8;
The above is written as 16 The binary number is 0x80 0000

seek m
m=0xFFFFFFFF-0x800000+1
=0xFFFFFFFF+1-0x800000
=0xFF800000

Other topics , The same reason as above , It can be the highest address , You can also calculate the storage capacity according to the address space range , It's relatively simple

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