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