This section contains the initial information needed to set up the Dahlia Carrier 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.

Getting started

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: 233.29 KB)

Dahlia Carrier Board V1.1

Dahlia Carrier Board V1.1 Datasheet (Size: 3.09 MB)

Dahlia Carrier Board V1.0

Dahlia Carrier Board V1.0 Datasheet (Size: 2.09 MB)

Verdin Family Specification (Size: 1.11 MB)

Dahlia Carrier Board Mechanical Models

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

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

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

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

Design and Layout Guide

Altium Designer

Compatible Products

Get PCN Notifications

Click to See the Product Numbering Scheme

Field	Description
PPPP	4-digit number (PID4) indicating the Product Family and variant
VV	2-digit number indicating the Product Version
AA	2-digit number indicating the Assembly Option

A specific product revision has a lifecycle defined by the product state. Learn more about it on the Product Change Notifications.

0155xxxx - Dahlia Carrier Board

Product #	Product Description	Changes from Previous Version	Release Date	Related Documents
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	Initial Release, no PCN
01551002	Dahlia Carrier Board V1.0C	- Removed resistor 100K Ohm	Q4, 2020	Intermediate Release, solving V1.0B compatibility issue
01551100	Dahlia Carrier Board V1.1A	- Implemented the changes related to the latest revision of the Verdin Family Specification - Fixed CTRL_FORCE_OFF_MOCI# pull-down resistor - Added temperature sensor - Added the HDMI connector - Replaced the CYPD3177-24LQXQ (IC23) Type-C power profile IC with STUSB4500QTR	Q2, 2021	Verdin Product Family Specification Update

Errata Document

Dahlia Carrier Board Errata (Rev. 1.01 | 2021-06-29 | 318.12 KB)

Errata/Known issues

Issue #	Status	Subject	Affected Versions	Implemented In

HAR-8291	Known Issue	The LED status signals of the on-module Ethernet PHY are swapped on the Dahlia	Dahlia carrier Board V1.1A Dahlia Carrier Board V1.0B Dahlia Carrier Board V1.0C
Customer Impact: The roles of the Ethernet link and activity LEDs are swapped (the wrong Ethernet LED is turned on or is blinking). Description: The KSZ9131 Ethernet PHY on the Verdin modules has two LED outputs (ETH_1_LED_1 and ETH_1_LED_2) which are used for indicating the link and activity statuses on the bus. These LEDs are available on pin 235 and 237 of the module edge connector, respectively. ETH_1_LED_1 (pin 235) is intended to indicate the activity status, while ETH_1_LED_2 (pin 237) is intended to indicate the link status. On the PCB versions 1.0 and 1.1, these two signals are swapped. In the next revision of the carrier board PCB, the connections will be corrected. In the Dahlia datasheet, the corrected connections are shown. Workaround: For custom carrier board designs, the correct LED connections should be implemented. A potential workaround could be flipping the roles and behavior of the LED outputs of the on-module Ethernet PHY in software. However, this is not supported by the related driver.
HAR-8017	Known Issue	CSI_1_MCLK Voltage Level is not 3.3V	Dahlia Carrier Board V1.0A Dahlia carrier Board V1.1A Dahlia Carrier Board V1.0B Dahlia Carrier Board V1.0C
Customer Impact: In case a MIPI CSI-2 camera requires the CSI_1_MCLK signal (pin #12 of X16), and in case it requires this signal to be at 3.3V level, then the current voltage level of the signal won't be compatible with the camera. Description: On the MIPI CSI-2 interface used on the Dahlia V1.1A, all of the single-ended signals are at 3.3V level, except for the CSI_1_MCLK signal (pin #12 of X16), which is at 1.8V level. Workaround: In case a MIPI CSI-2 camera requires the CSI_1_MCLK signal (pin #12 of X16), and in case it requires this signal to be at 3.3V level, it could be level shifted on custom carrier boards.
HAR-6255	Known Issue	CTRL_FORCE_OFF_MOCI# is disabled	Dahlia Carrier Board V1.0C	Dahlia carrier Board V1.1A
Customer Impact: 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. Description: R96 is not assembled on the product version V1.0C. 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.
HAR-3672	Known Issue	CTRL_FORCE_OFF_MOCI# has pull-down instead of pull-up resistor	Dahlia Carrier Board V1.0A Dahlia Carrier Board V1.0B	Dahlia carrier Board V1.1A
Customer Impact: 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. 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.
HAR-3351	Known Issue	Cypress USB-C PD detection chip does not behave as expected on Type-A to Type-C cables	Dahlia Carrier Board V1.0A Dahlia Carrier Board V1.0B Dahlia Carrier Board V1.0C	Dahlia carrier Board V1.1A
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	Dahlia Carrier Board V1.0A Dahlia carrier Board V1.1A Dahlia Carrier Board V1.0B Dahlia Carrier Board V1.0C
Customer Impact: When using the Dahlia in combination with a Verdin DSI to LVDS Adapter (connected to X17) and a 10.1” LVDS display (attached to the adapter), the carrier board won't turn on or will shut down if the power supply input voltage is < 7V. Description: When using the Dahlia in combination with a Verdin DSI to LVDS Adapter (connected to X17) and a 10.1” LVDS display (attached to the adapter), the carrier board won't turn on or will shut down if the power supply input voltage is < 7V. Workaround: Use USB-C PD power supplies with at least 9V or power the board over the barrel connector with at least 7V. Use a good USB cable. The quality of the cables has an impact on the +V_SUPPLY_FILT voltage stability.

Dahlia Carrier Board