fas_sync_period
fas_reg_write(fas, &fasreg->fas_sync_period, period); \
fas_reg_write(fas, (uchar_t *)&fasreg->fas_sync_period,
fas_reg_write(fas, (uchar_t *)&fasreg->fas_sync_period, 0);
(uchar_t *)&fasreg->fas_sync_period, 0);