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This repository was archived by the owner on May 6, 2023. It is now read-only.
So in order to provide the high res 4-lane CSI, the i2c pins are needed. The i2s interface is also needed for sound capture from HDMI. By counterpoint, the CM4 exposes ADC interfaces on the SOM connector that are not exposed through the standard pi 40 pin. It also doesn't expose the 12V rail we have access to through the ATX PSU.
Additionally, the 40-pin IDC connector is not "external grade" hardware.
Since many hats already won't work with the hardware above missing, I propose making a "different" 40-pin connector exposed internally which is not pin-compatible with the standard Pi header, then breaking that out onto the I/O shield with a 37 pin D-Sub connector on a ribbon cable. - Inspired by the Be Inc Geekport.
So in order to provide the high res 4-lane CSI, the i2c pins are needed. The i2s interface is also needed for sound capture from HDMI. By counterpoint, the CM4 exposes ADC interfaces on the SOM connector that are not exposed through the standard pi 40 pin. It also doesn't expose the 12V rail we have access to through the ATX PSU.
Additionally, the 40-pin IDC connector is not "external grade" hardware.
Since many hats already won't work with the hardware above missing, I propose making a "different" 40-pin connector exposed internally which is not pin-compatible with the standard Pi header, then breaking that out onto the I/O shield with a 37 pin D-Sub connector on a ribbon cable. - Inspired by the Be Inc Geekport.