pull-down resistor on both Configuration Channel (CC1 and CC2) lines. This caused e-marked cables to detect the Pi as an audio accessory and deny power. Subsequent revisions (Rev 1.2 and later) corrected this by allocating an independent pull-down resistor to each CC line, ensuring universal USB-PD compatibility.
Utilizes a 32-bit wide channels operating at 2400 MT/s.
Because the official schematic often does not label component part numbers, the community has worked to identify the major ICs (Integrated Circuits) on the Pi 4B. If you are reading a schematic of the Pi 4 (or examining a physical board), here are the critical components you are looking at:
Would you like a link to the official reduced schematic, the CM4 I/O board schematic (full), or the BCM2711 peripheral datasheet?
Help you locate specific for a particular project. Raspberry Pi 4 Model B specifications