PDC_RESET
tmp |= PDC_RESET;
if (tmp & PDC_RESET)
tmp |= PDC_RESET;
tmp &= ~PDC_RESET;
tmp |= PDC_RESET;
tmp &= ~PDC_RESET;
if (tmp & PDC_RESET)
tmp |= PDC_RESET;
tmp &= ~PDC_RESET;