PCCCMD_ENPB
pcc->cmdr = (pm_creg &= ~(PCCCMD_ENPA | PCCCMD_ENPB));
pcc->cmdr = (pm_creg |= (PCCCMD_ENPA | PCCCMD_ENPB));
ss->ss_curcmd |= PCCCMD_ENPB | PCCCMD_ENPA;
ss->ss_curcmd &= ~(PCCCMD_ENPB | PCCCMD_ENPA);