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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ATmega16 데이터시트(PDF) 258 Page - ATMEL Corporation |
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ATmega16 데이터시트(HTML) 258 Page - ATMEL Corporation |
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258 / 357 page  258 2466S–AVR–05/09 ATmega16(L) Note: 1. Z15:Z14: always ignored Z0: should be zero for all SPM commands, byte select for the LPM instruction. See “Addressing the Flash during Self-Programming” on page 251 for details about the use of Z-pointer during Self-Programming. Table 102. Explanation of Different Variables used in Figure 126 and the Mapping to the Z- pointer Variable Corresponding Z-value(1) Description PCMSB 12 Most significant bit in the Program Counter. (The Program Counter is 13 bits PC[12:0]) PAGEMSB 5 Most significant bit which is used to address the words within one page (64 words in a page requires 6 bits PC [5:0]). ZPCMSB Z13 Bit in Z-register that is mapped to PCMSB. Because Z0 is not used, the ZPCMSB equals PCMSB + 1. ZPAGEMSB Z6 Bit in Z-register that is mapped to PAGEMSB. Because Z0 is not used, the ZPAGEMSB equals PAGEMSB + 1. PCPAGE PC[12:6] Z13:Z7 Program Counter page address: Page select, for Page Erase and Page Write PCWORD PC[5:0] Z6:Z1 Program Counter word address: Word select, for filling temporary buffer (must be zero during page write operation) |
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