R01UH0823EJ0100 Rev.1.00 Page 240 of 1823
Jul 31, 2019
RX23W Group 11. Low Power Consumption
Example 2: From high-speed/middle-speed operating mode to low-speed operating mode
(High-speed operation in high-speed operating mode/middle-speed operation in middle-speed operating mode)
↓
Set the frequency of each clock to lower than the maximum operating frequency for low-speed operating mode
↓
Confirm that all clock sources but the sub-clock oscillator are stopped
↓
Confirm that the SOPCCR.SOPCMTSF flag is 0 (transition completed)
↓
Set the SOPCCR.SOPCM bit to 1 (low-speed operating mode)
↓
Confirm that the SOPCCR.SOPCMTSF flag is 0 (transition completed)
↓
Low-speed operation in low-speed operating mode
(2) Switching from Low Power Consumption Mode to Normal Power Consumption Mode
Example 1: From low-speed operating mode to high-speed/middle-speed operating mode
Low-speed operation in low-speed operating mode
↓
Confirm that the SOPCCR.SOPCMTSF flag is 0 (transition completed)
↓
Set the SOPCCR.SOPCM bit to 0 (high-speed operating mode or middle-speed operating mode)
↓
Confirm that the SOPCCR.SOPCMTSF flag is 0 (transition completed)
↓
Set the frequency of each clock to lower than the maximum operating frequency for high-speed/middle-speed operating
mode
↓
(High-speed operation in high-speed operating mode/middle-speed operation in middle-speed operating mode)
Example 2: From middle-speed operating mode to high-speed operating mode
Middle-speed operation in middle-speed operating mode
↓
Confirm that the OPCCR.OPCMTSF flag is 0 (transition completed)
↓
Set the OPCCR.OPCM[2:0] bit to 0 (high-speed operating mode)
↓
Confirm that the OPCCR.OPCMTSF flag is 0 (transition completed)
↓
Set the frequency of each clock to lower than the maximum operating frequency for high-speed operating mode
↓
High-speed operation in high-speed operating mode
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