M30222 Datasheet, PDF (200/237 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

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Specifications in this manual are tentative and subject to change
MITSUBISHI MICROCOMPUTERS
M30222 Group
Rev. G
CPU Rewrite Mode (Flash Memory Version)
SINGLE-CHIP 16-BIT 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 pro-
gram which has had the ID code preset at these addresses to the flash memory.
Figure 1.159 shows the storage location for the code addresses.
Address
0FFFDF16 to 0FFFDC 16 ID1 Undefined instruction vector
0FFFE316 to 0FFFE016 ID2 Overflow vector
0FFFE716 to 0FFFE416
BRK instruction vector
0FFFEB16 to 0FFFE8 16 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
ID7 NMI vector
0FFFFC16 to 0FFFFF16 _ROMCP Reset
Fig. 1.159. Code address storage
4 bytes
1-201