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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) 289 Page - ATMEL Corporation |
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ATmega328P датащи(HTML) 289 Page - ATMEL Corporation |
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289 / 448 page  289 8161D–AVR–10/09 ATmega48PA/88PA/168PA/328P 26.8.14 ATmega88PA Boot Loader Parameters In Table 26-7 through Table 26-9, 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:Z13: 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 26-7. Boot Size Configuration, ATmega88PA 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 4 0x000 - 0xF7F 0xF80 - 0xFFF 0xF7F 0xF80 1 0 256 words 8 0x000 - 0xEFF 0xF00 - 0xFFF 0xEFF 0xF00 0 1 512 words 16 0x000 - 0xDFF 0xE00 - 0xFFF 0xDFF 0xE00 0 0 1024 words 32 0x000 - 0xBFF 0xC00 - 0xFFF 0xBFF 0xC00 Table 26-8. Read-While-Write Limit, ATmega88PA Section Pages Address Read-While-Write section (RWW) 96 0x000 - 0xBFF No Read-While-Write section (NRWW) 32 0xC00 - 0xFFF Table 26-9. Explanation of Different Variables used in Figure 26-3 and the Mapping to the Z-pointer, ATmega88PA Variable Corresponding Z-value(1) Description PCMSB 11 Most significant bit in the Program Counter. (The Program Counter is 12 bits PC[11:0]) PAGEMSB 4 Most significant bit which is used to address the words within one page (32 words in a page requires 5 bits PC [4:0]). ZPCMSB Z12 Bit in Z-register that is mapped to PCMSB. Because Z0 is not used, the ZPCMSB equals PCMSB + 1. ZPAGEMSB Z5 Bit in Z-register that is mapped to PAGEMSB. Because Z0 is not used, the ZPAGEMSB equals PAGEMSB + 1. PCPAGE PC[11:5] Z12:Z6 Program counter page address: Page select, for page erase and page write PCWORD PC[4:0] Z5:Z1 Program counter word address: Word select, for filling temporary buffer (must be zero during page write operation) |
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