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> They only have very reduced schematics published, but it looks like the RPi4 isn't deploying a PD solution at all. I think they are just relying on the analog
by sdrothrock 7y ago
> They only have very reduced schematics published, but it looks like the RPi4 isn't deploying a PD solution at all. I think they are just relying on the analog signaling of Type-C. The power supply is just a "simple" type-c 5V/3A unit.
This is the first I've heard of the RPi 4 not having PD -- could you point me to the specs you saw? I searched around a bit but couldn't find anything either way.
- brandmeyer 7y agoYou have to dig a bit. I got there via Main Page -> scroll to very bottom -> documentation -> Hardware -> Raspberry Pi -> Schematics -> Raspberry Pi 4 Model B You can see the fixed resistors attached to the CC lines for basic Type-C analog signaling, and a simple PD_SENSE line connected to the power supply IC. https://www.raspberrypi.org/documentation/hardware/raspberrypi/schematics/rpi_SCH_4b_4p0_reduced.pdf https://www.raspberrypi.org/documentation/hardware/raspberry...
- sdrothrock 7y agoAh, wow, that's definitely a bit of digging! Thank you very much; I had my own suspicions due to the recommended power supply but it's nice to have more concrete evidence. :)