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R8C2K bảng dữ liệu(PDF) 381 Page - Renesas Technology Corp

tên linh kiện R8C2K
Giải thích chi tiết về linh kiện  RENESAS MCU R8C FAMILY / R8C/2x SERIES
PDF  471 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

R8C2K bảng dữ liệu(HTML) 381 Page - Renesas Technology Corp

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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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