> ## Documentation Index
> Fetch the complete documentation index at: https://dragonwingdocs.qualcomm.com/llms.txt
> Use this file to discover all available pages before exploring further.

#  MCU firmware module reference appendix

| Module                     | Responsibility                                                                                                            |
| -------------------------- | ------------------------------------------------------------------------------------------------------------------------- |
| Boot and startup           | Exception vectors, memory initialization, cache setup, platform initialization, and handoff to Zephyr or the application. |
| Interrupt manager          | Vector setup, IRQ registration, ISR dispatch, and wake-source classification.                                             |
| Power manager              | Wait-for-interrupt paths, low-power entry and exit, collapse preparation, and context handling                            |
| Resource voter             | Request, update, and release clock, CX, and DDR dependencies through the delivered platform API.                          |
| Timer services             | QTIMER programming, time-base conversion, and wake scheduling                                                             |
| Host interface             | Mailbox or event signaling, acknowledgments, and diagnostics                                                              |
| Peripheral stack           | UART, I2C, and I3C handling plus QUP and GPI coordination.                                                                |
| Sensor or workload manager | Service loops, event aggregation, thresholds, and escalation decisions.                                                   |