: It features a quad-core ARM Cortex-A72 64-bit processor running at 1.5 GHz.
: Unlike previous models, the Pi 4 supports up to 8GB of RAM. The memory is interfaced directly with the BCM2711 via a dedicated high-speed bus. VideoCore VI GPU Raspberry Pi 4 Model B Full Schematic
So, download the PDF, zoom in on that PMIC block, and take a moment to appreciate the "blueprint" of the world's favorite single-board computer. : It features a quad-core ARM Cortex-A72 64-bit
The schematic illustrates the LPDDR4 SDRAM integration. VideoCore VI GPU So, download the PDF, zoom
Raspberry Pi Ltd (formerly Raspberry Pi Trading) has always published for its flagship products. For the Pi 4B, the official document is called raspberry‑pi‑4‑reduced‑schematics.pdf . It is hosted on the official Raspberry Pi documentation portal and can be accessed directly via:
Nevertheless, the reduced schematics are extremely useful. They contain enough information to understand the board’s architecture, build compatible HATs (Hardware Attached on Top), diagnose many power or I/O problems, and even derive some of the missing details through reverse engineering and community collaboration.