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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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R8C2K 데이터시트(PDF) 381 Page - Renesas Technology Corp |
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R8C2K 데이터시트(HTML) 381 Page - Renesas Technology Corp |
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381 / 471 page  R8C/2K Group, R8C/2L Group 20. Flash Memory Rev.1.10 Dec 21, 2007 Page 364 of 450 REJ09B0406-0110 20.3 Functions to Prevent Rewriting of Flash Memory Standard serial I/O mode has an ID code check function, and parallel I/O mode has a ROM code protect function to prevent the flash memory from being read, rewritten, or erased. 20.3.1 ID Code Check Function The ID code check function is used in standard serial I/O mode. Unless 3 bytes (addresses from 0FFFCh to 0FFFEh) of the reset vector are set to FFFFFFh, the ID codes sent from the serial programmer or the on-chip debugging emulator and the 7-byte ID codes written in the flash memory are checked to see if they match. If the ID codes do not match, the commands sent from the serial programmer or the on-chip debugging emulator are not acknowledged. For details of the ID code check function, refer to 13. ID Code Areas. |
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