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SH7785 Datasheet(PDF) 175 Page - Renesas Technology Corp |
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SH7785 Datasheet(HTML) 175 Page - Renesas Technology Corp |
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175 / 1692 page  7. Memory Management Unit (MMU) Rev.1.00 Jan. 10, 2008 Page 145 of 1658 REJ09B0261-0100 There are two methods by which the MMU can perform mapping from virtual memory to physical memory: the paging method, using fixed-length address translation, and the segment method, using variable-length address translation. With the paging method, the unit of translation is a fixed-size address space called a page. In the following descriptions, the address space in virtual memory in this LSI is referred to as virtual address space, and the address space in physical memory as physical address space. MMU MMU Process 1 Physical Memory (1) (0) (2) (3) (4) Physical Memory Physical Memory Physical Memory Virtual Memory Virtual Memory Physical Memory Process 1 Process 1 Process 2 Process 3 Process 1 Process 1 Process 2 Process 3 Figure 7.1 Role of MMU |
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