PLX_NUM_SPAD
sc->spad_count1 = PLX_NUM_SPAD;
sc->spad_off1 += PLX_NUM_SPAD / 2 * 4;
sc->spad_offp1 += PLX_NUM_SPAD / 2 * 4;
sc->spad_count1 = PLX_NUM_SPAD / 2;