Interrupt Mask Register
| MOSCS | Main Oscillator Status Interrupt Mask |
| LOCKA | PLL A Lock Interrupt Mask |
| LOCKB | PLL B Lock Interrupt Mask |
| MCKRDY | Master Clock Ready Interrupt Mask |
| PCKRDY0 | Programmable Clock Ready 0 Interrupt Mask |
| PCKRDY1 | Programmable Clock Ready 1 Interrupt Mask |
| PCKRDY2 | Programmable Clock Ready 2 Interrupt Mask |
| PCKRDY3 | Programmable Clock Ready 3 Interrupt Mask |