M16C26 Datasheet, PDF (209/239 Pages) Renesas Technology Corp – 16-BIT CMOS SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/20 SERIES

Udenvdeelropment
Functions to
Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative and
Inhibit Rewriting Flash Memory Version
subject to change.
SINGLE-CHIP 16-BIT
M16C/26 Group
CMOS MICROCOMPUTER
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.
Address
0FFFDC16 to 0FFFDF16 ID1 Undefined instruction vector
0FFFE016 to 0FFFE316 ID2 Overflow vector
0FFFE416 to 0FFFE716
BRK instruction vector
0FFFE816 to 0FFFEB16 ^{ID3 Address match vector}
0FFFEC16 to 0FFFEF16 ID4 Single step vector
0FFFF016 to 0FFFF316 ID5 Watchdog timer vector
0FFFF416 to 0FFFF716 ID6 DBC vector
0FFFF816 to 0FFFFB16
0FFFFC16 to 0FFFFF16
ID7 NMI vector
Reset vector
4 bytes
Figure 1.21.2. ID code store addresses
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