The following table contains known issues, scheduled bug fixes, and feature improvements for the Apalis Evaluation Board.
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Description: Ixora does not contain STEP model available for download. The Altium project file displayed there downloaded with no file extension. STEP file for Apalis EVB is only a few bits size
Description: All currently available Toradex Apalis modules do not require a center tap voltage. Only 100nF capacitors are required on the center tap pins of the magnetics. Connecting the center tap signals together can degrade the signal quality and is therefore not recommended. Currently the center tap circuit is assembled trough R71, R72, R87, R164, C17, C288 and L2. This assembly has a measurable negative influence on the quality of the 10Mbps Ethernet signals on modules with Microchip’s KSZ9031 Ethernet PHY. We haven’t seen any impact to other PHY’s or to 100Base-T1 and 1000Base-T.
Workaround: We recommend to removing R71, R72, R87, R164, C17, C288 and L2 on the bottom of the Ixora Carrier Board. The center tap circuit is not assembled in the newer Ixora Carrier Board versions.
Description: Apalis Evaluation Board (V1.1 and V1.0) power supply is designed to supply a maximum output current of 5A at 3.3V rail (Evaluation Board V1.1) and 3.3A at 3.3V rail (Evaluation Board V1.0). The buck converter on the Apalis Evaluation Board features Output Over-Current Protection (OCP), which shuts down the power supply immediately if the output current exceeds the maximum output current limit. The peak current consumption of the Apalis iMX8QM or Apalis TK1 V1.0 module can be higher than 5A under stress conditions like processor / GPU intensive tasks. Under such conditions, Apalis Evaluation Board power supply might shut down due to OCP limits. A higher continuous current also results in rise in temperature of the carrier board near the power supply region, which affects the current sense resistor value and lead/solder-joint resistance. Customer who are evaluating / testing Apalis iMX8QM or Apalis TK1 (V1.0) module with Apalis Evaluation Board carrier board can use the below mentioned workaround. We will develop a new power supply for Apalis Evaluation Board which addresses this issue.
Workaround: In order to run the Apalis iMX8QM or Apalis TK1 (V1.0) module on the Apalis Evaluation Board, the module performance need to be reduced by making sure that the CPU is not fully loaded while the GPU is extensively used. As a temporary workaround for evaluation/testing purposes, it is possible to increase the output current of the power supply by changing the current sense resistor (R44) on the Apalis Evaluation Board (V1.1 and V1.0). A 0Ω (zero ohm) sense resistor can be used to set the output current to maximum, only under lab/evaluation conditions. Please check the current rating of the inductor (L21) and ensure that the output current of the power supply doesn’t exceed the rating of the inductor. With the proposed workaround, the buck converter could be thermally overloaded due to higher continuous (average) current, which may result in overheating or failure of some components on the Evaluation Board. If required it is OK to change the current sense resistor in the lab. However, we don't recommend such changes in the field.
Description: We need to create public packages for the Apalis Evaluation Board and add them to the GIT repository.
