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what is the difference in instruction and data memory
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Data memory (RAM)serves for storing and keeping data required for the proper operation of the programs. Depending on the program in progress, it can, but does not have to, be split into two sections. For DSP2 instruction set the data memory is considered to consist of two sectioins. The two data spaces are accessed by
Can someone tell me what is the difference between Instruction and data memory.
The processor only does what you tell it to do. As you noted, the processor can't tell the difference between "data" and "code" in memory: it's all just a sequence of bytes. It's what you tell it to do with those bytes that defines how it's treated. When a program is compiled, the generated executable file has
Program is instruction what CPU executes, data is information that program uses for customization and storage of how the program is supposed to carry those instructions. Program memory: Where the application is stored. Some chips allows parts of the program memory to be modified in blocks (segments), but you can't
The number of memory bits needed for each instruction (operator plus operand) is important. If only 8 bits were used then 3 bits could be used for the operation codes leaving 5 for the location in memory where the data is stored. This would however be very limiting as there could only be 8 possible operation codes and only
Harvard architecture is used as the CPU accesses the cache. The von Neumann nature of memory is then visible when instructions are written as data by the CPU and software must ensure that the caches (data and instruction) and write buffer are synchronized before trying to execute those just-written instructions.
1 Jul 2010 Secondly, small data structures use less memory. Instructions rarely change and can actually be stored in fixed memory on a chip such as flash memory or ROM. In the case of programmes actually embedded into on-chip hardware, it is very important to minimise the use of RAM and to maximise the use of
28 Sep 2011 i'm slightly confused about those two memories. i know that the name of memory corresponds to the type of data stored in it (duh), but i still don't quite see it. say we have the following assembly: MOV A, #24 ; move 0x24 to the accumulator does it mean that opcode for MOV will be stored in instruction
9 Sep 2008 It is possible to have two separate memory systems for a Harvard architecture. As long as data and instructions can be fed in at the same time, then it doesn't matter whether it comes from a cache or memory. But there are problems with this. Compilers generally embed data (literal pools) within the code,
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