R8CSLASH2G datasheet(266/344 Pages) RENESAS

部件名	R8C/2G

功能描述	RENESAS MCU R8C FAMILY / R8C/2x SERIES

PDF	344 Pages

Scroll/Zoom	100%

制造商	RENESAS [Renesas Technology Corp]

网页	http://www.renesas.com

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266 / 344 page

R8C/2G Group

20. Flash Memory

Rev.1.00

Apr 04, 2008

Page 246 of 318

REJ09B0387-0100

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 or rewritten or erasure easily.

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 14. ID Code Areas.

R8C/2G 数据表(PDF) 266 Page - Renesas Technology Corp