Hide navigation sidebar
Hide table of contents sidebar
Back to top
Toggle table of contents sidebar

# Overview

The approximate resource utilizations for Low Power FFD are shown in the table below.

Table 24 Low Power FFD Resources
Resource | Tile 0 | Tile 1
--- | --- | ---
Unused CPU Time (600MHz | 200MHz) | 50% | 10%
Total Memory Free | 19.1k | 5.3k
Runtime Heap Memory Free | 219k | 12.4k

The estimated (core) power usage for Low Power FFD are shown in the table below. Additional power savings may be possible using Sensory’s Low Power Sound Detect (LPSD) option which approaches sub-50mW operation in Low Power mode. These measurements will vary based on component tolerances and any user added code and/or user added compile options.

Table 25 Low Power FFD Power Usage
Power State | Core Power (mW)
--- | ---
Low Power | 54
Full Power | 110

The description of the software is split up by folder:

Table 26 Low Power FFD Software Description
Folder | Description
--- | ---
bsp_config | Board support configuration setting up software based IO peripherals
filesystem_support | Filesystem contents for application
model | Wake word and command model files
src | Main application
src/gpio_ctrl | GPIO and LED related functions
src/intent_engine | Intent engine integration
src/intent_handler | Intent engine output integration
src/power | Low power control logic
src/wakeword | Wake word engine integration