R01UH0823EJ0100 Rev.1.00
Page 186 of 1823
Jul 31, 2019
RX23W Group
9. Clock Generation Circuit
HCOVF Flag (HOCO Clock Oscillation Stabilization Flag)
This flag indicates whether oscillation of the HOCO clock is stable.
[Setting condition]
After the HOCOCR.HCSTP bit is set to 0 (HOCO is operating) when the HCSTP bit is 1 (HOCO is stopped),
supply of the HOCO clock is started to the MCU internally.
[Clearing condition]
After the HOCOCR.HCSTP bit is set to 1, the processing to stop the oscillation of the HOCO is completed.
UPLOVF Flag (USB-Dedicated PLL Clock Oscillation Stabilization Flag)
This flag indicates whether oscillation of the USB-dedicated PLL clock is stable.
[Setting condition]
After the UPLLCR2.UPLLEN bit is set to 0 (USB-dedicated PLL is operating) when the UPLLEN bit is 1
(USB-dedicated PLL is stopped), the MOOVF flag becomes 1 and the PLL clock stabilization wait time (tPLL) has
elapsed, and then supply of the USB-dedicated PLL clock is started to the MCU internally.
[Clearing condition]
After the UPLLCR2.UPLLEN bit is set to 1, the processing to stop the oscillation of the USB-dedicated PLL clock
is completed.