SK_IMCTL_START
sk_win_write_1(sc, SK_Y2_LEV_ITIMERCTL, SK_IMCTL_START);
sk_win_write_1(sc, SK_Y2_TX_ITIMERCTL, SK_IMCTL_START);
sk_win_write_1(sc, SK_Y2_ISR_ITIMERCTL, SK_IMCTL_START);
sk_win_write_1(sc, SK_IMTIMERCTL, SK_IMCTL_START);