Below are links to spreadsheets with the GPIO and its pinmuxes. These are derived from the board schematics.
- ALL-H3-CC
- AML-S805X-AC
- AML-S905X-CC
- AML-S905X-CC-V2
- AML-S905D-PC
- ROC-RK3328-CC
- ROC-RK3328-CC-V2
- ROC-RK3399-PC
- ROC-RK3399-PC-V1.2
Also see Libre Computer Wiring Tool and Libre Computer Pinmux Compatibility Matrix.