PCGCTL_STOPPCLK
pcgctl &= ~PCGCTL_STOPPCLK;
pcgctl &= ~(PCGCTL_ENBL_SLEEP_GATING | PCGCTL_STOPPCLK);
pcgcctl |= PCGCTL_STOPPCLK;
pcgcctl |= PCGCTL_STOPPCLK;
pcgcctl |= PCGCTL_STOPPCLK;
pcgcctl &= ~PCGCTL_STOPPCLK;
pcgctl |= PCGCTL_STOPPCLK;
pcgctl &= ~PCGCTL_STOPPCLK;