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CHAPTER 9 MEMORY ACCESS MODES
9.1 Outline of Memory Access Modes
In the F
2
MC-16LX, various modes are provided for access methods and access areas.
■ Outline of Memory Access Modes
●
Operation mode
Operation mode means the mode for controlling the device operation status. The operation mode is
specified by the MDx mode setting pin and the Mx bit in mode data. By selecting an operation mode,
normal operation activation or flash memory programming can be performed.
●
Bus mode
Bus mode means the mode for controlling the internal ROM operation and external access function. The
bus mode is specified by the MDx mode setting pin and the Mx bit in mode data. The MDx mode setting
pin specifies the bus mode for reading the reset vector and mode data, and the Mx bit in mode data
specifies the bus mode for normal operation.
●
Run mode
Run mode means the CPU operation mode. The run mode has the main clock mode, PLL clock mode, and
various low-power consumption mode. See CHAPTER 8 "LOW-POWER CONSUMPTION MODE" for
details.
Table 9.1-1 Mode Pin and Mode
Operation mode Bus mode
RUN mode Single-chip
Flash programming −