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ATmega16U4 Datasheet(PDF) 346 Page - ATMEL Corporation |
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ATmega16U4 Datasheet(HTML) 346 Page - ATMEL Corporation |
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346 / 408 page  346 7766D–AVR–01/09 ATmega16U4/ATmega32U4 27.7.14 ATmega16U4/ATmega32U4 Boot Loader Parameters In Table 27-8 through Table 27-10, the parameters used in the description of the Self-Program- ming are given. Note: 1. The different BOOTSZ Fuse configurations are shown in Figure 27-2 Note: 1. For details about these two section, see “NRWW – No Read-While-Write Section” on page 333 and “RWW – Read-While-Write Section” on page 333. Table 27-8. Boot Size Configuration (Word Addresses) (1) 1 1 256 words 4 0x0000 - 0x3EFF 0x3F00 - 0x3FFF 0x3EFF 0x3F00 1 0 512 words 8 0x0000 - 0x3DFF 0x3E00 - 0x3FFF 0x3DFF 0x3E00 0 1 1024 words 16 0x0000 - 0x3BFF 0x3C00 - 0x3FFF 0x3BFF 0x3C00 0 0 2048 words 32 0x0000 - 0x37FF 0x3800 - 0x3FFF 0x37FF 0x3800 1 1 256 words 4 0x0000 - 0x1EFF 0x1F00 - 0x1FFF 0x1EFF 0x1F00 1 0 512 words 8 0x0000 - 0x1DFF 0x1E00 - 0x1FFF 0x1DFF 0x1E00 0 1 1024 words 16 0x0000 - 0x1BFF 0x1C00 - 0x1FFF 0x1BFF 0x1C00 0 0 2048 words 32 0x0000 - 0x17FF 0x1800 - 0x1FFF 0x17FF 0x1800 Table 27-9. Read-While-Write Limit (Word Addresses)(1) Device Section Pages Address ATmega32U4 Read-While-Write section (RWW) 224 0x0000 - 0x37FF No Read-While-Write section (NRWW) 32 0x3800 - 0x3FFF ATmega16U4 Read-While-Write section (RWW) 97 0x0000 - 0x17FF No Read-While-Write section (NRWW) 32 0x1800 - 0x1FFF Table 27-10. Explanation of different variables used in Figure 27-4 and the mapping to the Z- pointer Variable Corresponding Z-value(1) Description PCMSB 13 Most significant bit in the Program Counter. (The Program Counter is 14 bits PC[13:0]) |
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