M16C Datasheet, PDF (228/262 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Preliminary Specifications REV.B
Mitsubishi microcomputers
Specifications in this manual are tentative and subject to change.
M16C / 6N Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Functions To Inhibit Rewriting On-chip Flash Memory
ID Code Check Function
Use this function in standard serial I/O mode. When the contents of the flash memory is not blank, the
ID code sent from the serial programmer 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 serial programmer are not
accepted. The ID code consists of 8-bit data, the area of which, beginning with the first byte, are
0FFFDF16, 0FFFE316, 0FFFEB16, 0FFFEF16, 0FFFF316, 0FFFF716 and 0FFFFB16. Write a program
which has the ID code preset at these addresses to the flash memory.
Address
0FFFDF16 to 0FFFDC16 ID1 Undefined instruction vector
0FFFE316 to 0FFFE016 ID2 Overflow vector
0FFFE716 to 0FFFE416
BRK instruction vector
0FFFEB6 to 0FFFE816 ^{ID3 Address match vector}
0FFFEF16 to 0FFFEC16 ID4 Single step vector
0FFFF316 to 0FFFF016 ID5 Watchdog timer vector
0FFFF716 to 0FFFF416 ID6 DBC vector
0FFFFB16 to 0FFFF816
0FFFFF16 to 0FFFFC16
ID7 NMI vector
Reset
Figure 23-10. ID code store addresses
4 bytes
228