M16CSLASH26 datasheet(209/239 Pages) RENESAS

209 / 239 page

Functions to Inhibit Rewriting Flash Memory Version

203

Renesas Technology Corp.

M16C/26 Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Under

development

Preliminary Specifications Rev. 0.9

Specifications in this manual are tentative and subject to change.

ID Code Check Function

Use this function in standard serial I/O mode. When the contents of the flash memory are not blank, the

ID code sent from the peripheral unit is compared with the ID code written in the flash memory to see if

they match. If the ID codes do not match, the commands sent from the peripheral unit are not accepted.

The ID code consists of 8-bit data, the areas of which, beginning with the first byte, are 0FFFDF16,

0FFFE316, 0FFFEB16, 0FFFEF16, 0FFFF316, 0FFFF716, and 0FFFFB16. Write a program which has had

the ID code preset at these addresses to the flash memory.

Figure 1.21.2. ID code store addresses

Reset vector

Watchdog timer vector

Single step vector

Address match vector

BRK instruction vector

Overflow vector

Undefined instruction vector

ID7

ID6

ID5

ID4

ID3

ID2

ID1

DBC vector

NMI vector

0FFFFC16 to 0FFFFF16

0FFFF816 to 0FFFFB16

0FFFF416 to 0FFFF716

0FFFF016 to 0FFFF316

0FFFEC16 to 0FFFEF16

0FFFE816 to 0FFFEB16

0FFFE416 to 0FFFE716

0FFFE016 to 0FFFE316

0FFFDC16 to 0FFFDF16

4 bytes

Address

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