Interrupt Enable Register
| MOSCXTS | Main Crystal Oscillator Status Interrupt Enable |
| LOCKA | PLLA Lock Interrupt Enable |
| MCKRDY | Master Clock Ready Interrupt Enable |
| LOCKU | UTMI PLL Lock Interrupt Enable |
| PCKRDY0 | Programmable Clock Ready 0 Interrupt Enable |
| PCKRDY1 | Programmable Clock Ready 1 Interrupt Enable |
| MOSCSELS | Main Oscillator Selection Status Interrupt Enable |
| MOSCRCS | Main On-Chip RC Status Interrupt Enable |
| CFDEV | Clock Failure Detector Event Interrupt Enable |