Low-Order Bytes of QPRC Interrupt Control Register
| QPCMIE | PC match interrupt enable bit |
| QPCMF | PC match interrupt request flag bit |
| QPRCMIE | PC and RC match interrupt enable bit |
| QPRCMF | PC and RC match interrupt request flag bit |
| OUZIE | “Overflow, underflow, or zero index interrupt enable bit” |
| UFDF | Underflow interrupt request flag bit |
| OFDF | Overflow interrupt request flag bit |
| ZIIF | Zero index interrupt request flag bit |