Dahlia Carrier Board

Carrier Board for Verdin System on Module Family
Supports many connectivity and multimedia I/Os on a small form-factor
Ideal for development and mass-production

Getting Started
Hardware Features
Block Diagram
Datasheets
Design Resources
Compatible Products
Revision History
Errata/Known issues

This section contains initial information needed to set-up the Verdin Development Board for the first time.

Recommendation for the first-time order

Toradex recommends ordering the following additional products for your first-time order:

A Verdin Computer on Module

All the products can be ordered online at Toradex Webshop.

The Verdin SoMs come with Toradex Easy Installer pre-installed. Once you power-on the board, it will display a list of available images to be installed. Check out how to get started with the Toradex Easy Installer:

Toradex Easy Installer - Getting Started

For quickstart step-by-step instructions about how to start using Torizon, please have a look at our step-by-step Getting-Started Guide:

Warning: the step-by-step Getting Started guide is not yet available for Verdin.

Verdin step-by-step Getting Started Coming Soon

For detailed instructions about how to start developing your software for this Computer on Module, check out our software page. The following Linux-based offerings are currently supported:

Yocto Project Reference Images - binary images built with Toradex reference recipes, a great starting point for customized Linux images

The following Linux-based offerings will be supported soon:

TorizonCore - open source easy-to-use industrial Linux operating system

Additional information

For information on how to re-flash an operating system or image on the computer on module please check the Toradex Easy Installer article:

Toradex Easy Installer

We have quick video tutorials:

Toradex on YouTube

For developing software on the platform, please browse through the list of knowledge-base articles provided in the link below:

Getting Started with Toradex Arm Modules

Having trouble?

Please contact our technical support. Various option of technical support are mentioned below:

Technical Support Channels

Check the hardware features on the product page in toradex.com:

Dahlia Carrier Board

Dahlia Carrier Board Block Diagram (Size: 86.04 KB)

Dahlia Carrier Board

Dahlia Carrier Board Datasheet (Size: 2.1 MB)

Design and Layout Guide

Design Data:

Mechanical Models:

A basic 3D model for the Dahlia Carrier Board can be downloaded here.

3D EASM Model

This is a SolidWorks CAD model. You can download the free eDrawings model viewer from SolidWorks here.

3D STEP Model

It is a generic STEP model that can be opened and modified in any 3D CAD.

3D PDF Model

It is a generic 3D pdf model that can be opened in Adobe Reader.

Product #	Product Description	Changes from Previous Version	Release Date	PCN Document
01551000	Dahlia Carrier Board V1.0A	Internal version only	-	No PCN document, internal version only
01551001	Dahlia Carrier Board V1.0B	Initial public release	July, 2020
01551002	Dahlia Carrier Board V1.0C	- Removed resistor 100K Ohm	Q4, 2020

Errata Document

Dahlia Carrier Board Errata (Size: 274.25 KB)

Errata/Known issues

Issue #	Status	Subject

To Be Scheduled
Issues in this section are not scheduled yet. Please get in touch with our support if you need to have any of these issues scheduled. https://www.toradex.com/support
HAR-3284	Known Issue	SD_1_CD# circuit is pulled up to wrong rail
Description: The power for the MicroSD Card cannot be turned off. This is not fully compliant with the SD card specifications. Workaround: A public workaround is not needed, a hardware patch has been implemented on the product to solve this issue.
HAR-3351	Known Issue	Cypress USB-C PD detection chip does not behave as expected on Type-A to Type-C cables
Description: Because of the unexpected behaviour of the Cypress USB-C PD detection chip, the Dahlia board is turning on even with an improper USB power source. Workaround: Use the Dahlia Carrier board only with suitable USB power sources. Alternatively, USB Type-A to Type-C cables or adapters without a pull-up resistor on CC line can be used.
HAR-3302	Known Issue	System doesn't boot with Verdin DSI to LVDS Adapter attached
Description: When using Verdin DSI to LVDS Adapter inserted to X17, Carrier Board with the 10.1” LVDS display attached to the adapter will fail if it is powered from the 5V power source. Workaround: Use USB-C PD power supplies with at least 9V or power the board over the barrel connector with at least 9V. Use a good USB cable. The quality of the cables has an impact on the +V_SUPPLY_FILT voltage stability.
Dahlia carrier Board 1.1A
HAR-3672	Known Issue	CTRL_FORCE_OFF_MOCI# has pull-down instead of pull-up resistor
Description: The CTRL_FORCE_OFF_MOCI# input on the Dahlia carrier board features a 1MΩ pull-down resistor instead of a pull-up resistor. In the Verdin family definition, the CTRL_FORCE_OFF_MOCI# signal is specified as open-drain signal that is 5V tolerant. The pull-up resistor is supposed to be on the carrier board. Without this pull-up resistor, the CTRL_FORCE_OFF_MOCI# remains low and therefore is asserted all the time. The CTRL_FORCE_OFF_MOCI# signal is permanently pulling down the kill input of the power button IC LTC2954 (IC10). The LTC2954 ignores the kill input for the first 512ms after turning on. After this internal timer is expired, the kill signal will power off the system. This means pressing the power button on the Dahlia carrier board will turn on the power only for 512ms. Workaround: Removing R96 disables the CTRL_FORCE_OFF_MOCI# signal on the Dahlia carrier board. However, this disables the “kill-feature” entirely. Therefore, after a shutdown, the main supplies are not turned off. For turning off the main power rails, the power button needs to be pressed for >7s. Besides this inconvenience, the modification is compatible with all Verdin module versions.