Usage precaution

Mitsubishi microcomputers

M16C / 62M Group

(Low voltage version)

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

26

Notes on the microprocessor mode and transition after shifting from the micropro-

cessor mode to the memory expansion mode

• Microprocessor mode

In microprocessor mode, the SFR, internal RAM, and external memory space can be accessed.

For that reason, the internal ROM area cannot be accessed.

• Memory expansion mode

In memory expansion mode, external memory can be accessed in addition to the internal memory

space (SFR, internal RAM, and internal ROM).

However, after the reset has been released and the operation of shifting from the microprocessor

the CPU shifts to the memory expansion mode.