Renesas RX Series

R01UH0823EJ0100 Rev.1.00 Page 193 of 1823
Jul 31, 2019
RX23W Group 9. Clock Generation Circuit
Figure 9.2 Example of MEMWAIT Bit Setting Procedure When Changing ICLK Frequency to Higher than 32
MHz
Figure 9.3 Example of MEMWAIT Bit Setting Procedure When Changing ICLK Frequency to Lower than 32
MHz
Start
Change to high-speed mode
*1
End
Change ICLK frequency to higher
than 32 MHz
MEMWAIT.MEMWAIT bit = 1
Note 1. Resetting is not necessary in high-speed mode.
MEMWAIT.MEMWAIT bit = 1?
No
Yes
Start
Change ICLK frequency to lower
than 32 MHz
End
Change operating power control
state
*1
MEMWAIT.MEMWAIT bit = 0
Note 1. Resetting is not necessary when the state is not changed.
MEMWAIT.MEMWAIT bit = 0?
No
Yes