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ATPL00B Datasheet(PDF) 24 Page - ATMEL Corporation |
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ATPL00B Datasheet(HTML) 24 Page - ATMEL Corporation |
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24 / 152 page ![]() Atmel ATPL00B [datasheet] 43028A-ATPL - 9/12 24 Example: SX(1:0)=”00” (common memory size = 32KB) PC=0x9F5A (PC pointing to an address in extended memory) P0(5:0)= 0x01 (extended page 1) LOGIC ADDRESS=0x1F5A, extended page 1 PHYSICAL ADDRESS=0x11F5A Figure 4-7. Extended Addressing example 3 Thus if PC < SCS then Physical Address = PC else Physical Address = PC+(EPN*SEP) where SCS= Size of Common Space; EPN=Extended Page Number; SEP= Size of Extended Pages(defined by SX(1:0) value). Common Program PAGE 0 PAGE 1 0x000000 0x00BFFF 0x00C000 0x00FFFF 0x010000 PAGE 2 0x013FFF 0x014000 Common Program PAGE 1 0x000000 0x00BFFF 0x010000 0x013FFF Physical Address = 0x11F5A PC=0x9F5A Logical Address = 0x1F5A, (extended page 1) Physical Address = PC+(EPN*SEP)= PC+(1*0x8000) = 0x11F5A |
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