User's Manual

R01UH0823EJ0110 Rev.1.10 Page 241 of 1852
Nov 30, 2020
RX23W Group 11. Low Power Consumption
SOPCMTSF Flag (Sub Operating Power Control Mode Transition Status Flag)
The SOPCMTSF flag indicates the switching control state when the sub operating power control mode is switched.
This flag becomes 1 when the value of the SOPCM bit is rewritten, and 0 when mode transition is completed. Read this
flag and confirm that it is 0 before proceeding to the next processing. Only rewrite the SOPCM bit when this flag is 0.
Note: When using the FCLK at lower than 4 MHz during programming or erasing the flash memory, the frequency can be set to 1, 2,
or 3 MHz.
Note 1. Change the value according to the procedure for setting the MEMWAIT bit.
Note 2. It is not necessary to set the MEMWAIT bit to 1.
Each operating power control mode is described below.
Table 11.4 Operating Frequency and Voltage Ranges in Operating Power Control Modes
Operating
Power Control
Mode
OPCM[2:0]
Bits
SOPCM
Bit
Operating
Voltage
Range
Operating Frequency Range
MEMWAIT
Bit
Flash Memory Read Frequency
Flash Memory
Programming
/Erasure
Frequency
ICLK FCLK PCLKD PCLKB PCLKA FCLK
High-speed
operating mode
000b 0 2.7 to 3.6 V 32 to 54 MHz Up to 32 MHz Up to 54 MHz Up to 32 MHz Up to 54 MHz 1 to 32 MHz 1*
1
Up to 32 MHz 0/1*
1
2.4 to 2.7 V Up to 16 MHz Up to 16 MHz Up to 32 MHz Up to 16 MHz Up to 16 MHz — 0*
2
1.8 to 2.4 V Up to 8 MHz Up to 8 MHz Up to 8 MHz Up to 8 MHz Up to 8 MHz — 0*
2
Middle-speed
operating mode
010b 0 2.4 to 3.6 V Up to 12 MHz Up to 12 MHz Up to 12 MHz Up to 12 MHz Up to 12 MHz 1 to 12 MHz 0
1.8 to 2.4 V Up to 8 MHz Up to 8 MHz Up to 8 MHz Up to 8 MHz Up to 8 MHz 1 to 8 MHz 0
Low-speed
operating mode
000b 1 1.8 to 3.6 V Up to
32.768 kHz
Up to
32.768 kHz
Up to
32.768 kHz
Up to
32.768 kHz
Up to
32.768 kHz
—0
010b 1 1.8 to 3.6 V