M30622SAFP MITSUBISHI [Mitsubishi Electric Semiconductor], M30622SAFP Datasheet - Page 174

• Manufacturer Part Number: M30622SAFP
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Usage precaution
174
External ROM version
Notes on the microprocessor mode and transition after shifting from the micropro-
cessor mode to the memory expansion mode
The external ROM version is operated only in microprocessor mode, so be sure to perform the following:
• Microprocessor mode
• Memory expansion 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.
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
mode has started (“H” applied to the CNV
the CPU shifts to the memory expansion mode.
• Connect CNVss pin to Vcc.
• Fix the processor mode bit to “11
2
”
SS
pin), the internal ROM area cannot be accessed even if
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
M16C / 62A Group
Mitsubishi microcomputers