Set peripheral bits to 1 to mark as secure access only.
| EMU | EMU Secure Access |
| CMU | CMU Secure Access |
| HFXO0 | HFXO0 Secure Access |
| HFRCO0 | HFRCO0 Secure Access |
| FSRCO | FSRCO Secure Access |
| DPLL0 | DPLL0 Secure Access |
| LFXO | LFXO Secure Access |
| LFRCO | LFRCO Secure Access |
| ULFRCO | ULFRCO Secure Access |
| MSC | MSC Secure Access |
| ICACHE0 | ICACHE0 Secure Access |
| PRS | PRS Secure Access |
| GPIO | GPIO Secure Access |
| LDMA | LDMA Secure Access |
| LDMAXBAR | LDMAXBAR Secure Access |
| TIMER0 | TIMER0 Secure Access |
| TIMER1 | TIMER1 Secure Access |
| TIMER2 | TIMER2 Secure Access |
| TIMER3 | TIMER3 Secure Access |
| TIMER4 | TIMER4 Secure Access |
| USART0 | USART0 Secure Access |
| USART1 | USART1 Secure Access |
| BURTC | BURTC Secure Access |
| I2C1 | I2C1 Secure Access |
| CHIPTESTCTRL | CHIPTESTCTRL Secure Access |
| SYSCFGCFGNS | SYSCFGCFGNS Secure Access |
| SYSCFG | SYSCFG Secure Access |
| BURAM | BURAM Secure Access |
| GPCRC | GPCRC Secure Access |
| DCI | DCI Secure Access |