Fujitsu MB90420/5 (A) Series Hardware Manual page 522

F2mc-16lx family 16-bit microcontrollers
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[bit 2, 0] LPM1, LPM0 (Low Power Mode)
These bits control the current consumption of the flash memory when the flash memory is accessed.
However, since the period of time during which flash memory is accessed from the CPU depends greatly
on the setting, select a setting in accordance with the CPU operating frequency.
01: Low-power consumption mode (operation at internal operating frequency of 4 MHz or less)
10: Low-power consumption mode (operation at internal operating frequency of 8 MHz or less)
11: Low-power consumption mode (operation at internal operating frequency of 10 MHz or less)
00: Normal-power consumption mode (operation at internal operating frequency of 16 MHz or less)
Note:
Both the RDYINT and RDY bits never change at the same time. Programs should be created so
as to determine using either one of the bits.
1-MBIT FLASH MEMORY
Automatic algorithm
End timing
RDYINT bit
RDY bit
1 machine cycle
25-9

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