NXP Semiconductors SLN-LOCAL2-IOT, Руководство пользователя

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Table 6. Summary of LED color and behavior (continued)
Function LED State (D2) Color Description
Push-to-Talk (PTT) mode Solid Cyan
The device is on PTT mode. By
pressing SW1, wake word detection
phase is bypassed and the device
listens to a command.
Initialization Failed Solid Red
The device failed to initialize AFE
or ASR.
Audio stream error Solid Purple
Audio stream after AFE is not
transferred to ASR.
ASR memory error Solid Orange
During initialization or language or
demo change, an error occurred in
verifying memory pool size.
There are two on-board buttons that can be used for input interfaces. SW1 is used for the PTT mode. SW2 is used for the
MSD mode.
The following interfaces are available:
• Output interface
— Serial terminal via USB CDC by default
— UART
— LED indicator
— On-board speaker
• Input interface
— Serial terminal via USB CDC – shell commands
— Two on-board buttons
3.8 Security architecture
The SLN-LOCAL2-IOT kit is built and designed in a way that enables the best security practices, while maintaining the
development kit feel. The main security mechanisms implemented are the image verification stages that are required for every
image programmed into the device. By default, the image verification is enabled in the SLN-LOCAL2-IOT kit. For more details
about the security architecture, see
Security architecture .
3.9 Automated manufacturing tools
NXP provides a package of scripts that can be used for manufacturing programming and reprogramming of devices on the
production line without the J-Link. This collection of scripts is called Ivaldi. The Ivaldi package allows developers to program all the
required firmware binaries into a flash device using a single command. To learn more about the automated manufacturing tools,
see
Chapter 11 .
NXP Semiconductors
Introduction
SLN-LOCAL2-IOT Developer’s Guide, Rev. 0, 19 April 2021
User's Guide 18 / 87