M32CSLASH8B datasheet(322/406 Pages) RENESAS

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M32C/8B Group

23. Flash Memory

Preliminary specification

Specifications in this manual are tentative and subject to change.

REJ09B0450-0050 Rev.0.50 Oct 31, 2008

Page 305 of 385

23.3.3

ID Code Check Function

The ID code check function is used in standard serial I/O mode. The ID code sent from the serial programmer

and the ID code written in the user ROM area of the flash memory are checked to see if they match. If these ID

codes do not match, the commands sent from the serial programmer are not accepted. However, if the four bytes

of the reset vector are set to FFFFFFFFh(1), the ID codes are not checked and all commands can be accepted.

The ID code is 7-byte data stored consecutively, beginning with the first byte, into addresses 0FFFFDFh,

0FFFFE3h, 0FFFFEBh, 0FFFFEFh, 0FFFFF3h, 0FFFFF7h, and 0FFFFFBh. To use the ID code check

function, write the program which specifies the ID code to these addresses.

NOTE:

1. FFFFFFFFh is the factory default setting.

Figure 23.5

Addresses for Stored ID Codes

Reset Vector

NMI Vector

Watchdog Timer Vector

Address Match Vector

BRK Instruction Vector

Overflow Vector

Undefined Instruction Vector

ID7

ID6

ID5

ID4

ID3

ID2

ID1

FFFFFFh to FFFFFCh

FFFFFBh to FFFFF8h

FFFFF7h to FFFFF4h

FFFFF3h to FFFFF0h

FFFFEFh to FFFFECh

FFFFEBh to FFFFE8h

FFFFE7h to FFFFE4h

FFFFE3h to FFFFE0h

FFFFDFh to FFFFDCh

4 bytes

Address

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