When doing changes in the pinmux sheet of the AGX Thor, we are not able to change the open-drain select field. However when we change some pins to unused, we get the following error message:
Error: 3.3V Tolerance cannot be enabled on an Unused Pin
We for example do not need I2C4_CLK and I2C4_DAT in our design. Can we ignore the error message or how can we solve this?
Another point is that GPIO08 (Pin B62) and GPIO09 (Pin C61) are listed under 1.8V, but in the schematic “P4071_A02_Concept_schematics.pdf” they appear as 3.3V. Is there nowhere a list of all Pins of the module with further information like the Type? In the File “Jetson_Thor_Series_Pin_Descriptions_v1.0.nvxlsx” this seems to be missing.
When changing the customer usage to “unused” in the sheet. The same happens with all other pins that are defined as unused and where the open-drain select is “enabled”.
The template version is 1.0 which is the newest available in the Jetson Download Center. With these errors, it is also not possible to create the DT Files.
Pinmux template v1.1 expected to be released soon.
GPIO08 (Pin B62) and GPIO09 (Pin C61) are listed under 1.8V in the pinmux and it is correct as this reflects how it is powered from the the Thor SOC side. There is a level shifter(CMOS) on the module which shifts these to 3.3V, and so the schematics “P4071_A02_Concept_schematics.pdf” they appear as 3.3V is also correct, if that makes sense to you.
In this version, some GPIOs that were before configurable, are now hidden and cannot be changed anymore (for example row 288-291). Can you please check this? It would also be nice if somehow the configuration could be transferred from one pinmux sheet to the other, as otherwise everything needs to be done by hand when a new version comes out.
I think the hidden configurations are to prevent user to configure or they are not configurable. Since they are still ER/EA releases, they are used to verify the design and the development. We would suggest waiting for the GA release.
In v1.0 they were configurable, then in v1.1 not anymore. We are designing a carrier board and need to know which gpio can be used and which cannot be used. Please check again, we cannot wait until the GA release.
Please refer to latest Jetson Thor Design Guide (v1.2). The latest Jetson Thor pinmux (v1.2) is aligned with the latest Jetson Thor reference carrier board design files. Please check if you could use the pins for unused interfaces/SFIOs as GPIOs which are included in the Design Guide v1.2. Additional list of GPIOs supported expected to be updated in later releases of design collateral.
Let’s take line 290 of the pinmux which is CAM0_PWDN. In the version 1.2 of the pinmux, it is no changeable anymore. So can we use it for this function in our design or are we not able to configure it and should switch to another GPIO?