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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ATmega165 데이터시트(PDF) 245 Page - ATMEL Corporation |
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ATmega165 데이터시트(HTML) 245 Page - ATMEL Corporation |
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245 / 336 page  245 ATmega165/V 2573G–AVR–07/09 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 238 for details about the use of Z-pointer during Self-Programming. Table 98. Explanation of different variables used in Figure 110 and the mapping to the Z-pointer(1) Variable Corresponding Z-value 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 six 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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