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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATmega328P датащи(PDF) 290 Page - ATMEL Corporation |
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ATmega328P датащи(HTML) 290 Page - ATMEL Corporation |
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290 / 448 page  290 8161D–AVR–10/09 ATmega48PA/88PA/168PA/328P 26.8.15 ATmega168PA Boot Loader Parameters In Table 26-10 through Table 26-12, the parameters used in the description of the self programming are given. Note: The different BOOTSZ Fuse configurations are shown in Figure 26-2 on page 280. For details about these two section, see ”NRWW – No Read-While-Write Section” on page 278 and ”RWW – Read-While- Write Section” on page 278 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 282 for details about the use of Z-pointer during Self- Programming. Table 26-10. Boot Size Configuration, ATmega168PA BOOTSZ1 BOOTSZ0 Boot Size Pages Application Flash Section Boot Loader Flash Section End Application Section Boot Reset Address (Start Boot Loader Section) 1 1 128 words 2 0x0000 - 0x1F7F 0x1F80 - 0x1FFF 0x1F7F 0x1F80 1 0 256 words 4 0x0000 - 0x1EFF 0x1F00 - 0x1FFF 0x1EFF 0x1F00 0 1 512 words 8 0x0000 - 0x1DFF 0x1E00 - 0x1FFF 0x1DFF 0x1E00 0 0 1024 words 16 0x0000 - 0x1BFF 0x1C00 - 0x1FFF 0x1BFF 0x1C00 Table 26-11. Read-While-Write Limit, ATmega168PA Section Pages Address Read-While-Write section (RWW) 112 0x0000 - 0x1BFF No Read-While-Write section (NRWW) 16 0x1C00 - 0x1FFF Table 26-12. Explanation of Different Variables used in Figure 26-3 and the Mapping to the Z-pointer, ATmega168PA 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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