# Acronyms and terms

Sensors-related acronyms and expansions for better understanding.

| **Acronym or term** | **Definition** |
| --- | --- |
| aDSP | Application digital signal processor |
| ALS | Ambient light sensor |
| AMD | Absolute motion detector |
| ASCP | Asynchronous COM port |
| DPC | Device position classifier |
| DRI | Data ready interrupt |
| EIS | Electronic image stabilization |
| FFT | fast Fourier transform |
| FIFO | First-in, first-out |
| GRV | Game rotation vector |
| HAL | Hardware abstraction layer |
| HLOS | High-level operating system |
| I^2^C | Inter-integrated circuit |
| I^3^C | Improved I^2^C |
| IBI | In-band interrupt |
| IIR | Infinite impulse response |
| IMU | Inertial measurement unit |
| IPC | Interprocessor communication |
| MCPS | Million cycles per second |
| MTU | Maximum transmission unit |
| ODR | Output data rate |
| OSA | OS abstraction |
| PAL | Platform abstraction layer |
| PD | Protection domain |
| QSH | Qualcomm sensing hub |
| QuP | Qualcomm universal peripherals |
| QuRT | Qualcomm Real-Time Operating System |
| RMD | Relative motion detector |
| RTOS | Real-time operating system |
| RV | Rotation vector |
| SCP | Synchronous COM port |
| SCons | Software construction |
| SMD | Significant motion detector |
| SMP2P | Shared memory point to point |
| SoC | System-on-chip |
| SPI | Serial peripheral interface |
| SSC | Qualcomm® Snapdragon™ sensors core |
| SUID | Sensor unique identifier |
| UART | Universal asynchronous receiver/transmitter |

Last Published: May 07, 2026

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