Raspberry Pi 4 Model B Full Link | Schematic
Technical Analysis: Raspberry Pi 4 Model B Full Schematic
MIPI CSI/DSI
: Interface paths for camera and display flex cables. Raspberry Pi 4 Model B specifications
Raspberry Pi 4 Model B
The represents a significant leap in single-board computing, offering desktop-class performance in a compact form factor. For hardware engineers, embedded developers, and advanced hobbyists, access to the full schematic is not merely a reference—it is an essential tool for debugging, custom hardware integration, and understanding the design philosophy of the platform. Unlike a simplified block diagram, the full schematic provides a component-level electrical roadmap of the board. Raspberry Pi 4 Model B Full Schematic
Key subsystems and highlights
- Add a powered header for an external USB hub: draw 5V from the board’s 5V rail after the polyfuse and add a high-current connector, but include an additional fuse and dedicated ground plane stitching.
- Add HAT EEPROM and pass-through I2C level shifting for 5V peripherals.
- Expose more testpoints for monitoring PMIC rails and the SoC 3.3V domain (copy existing TP footprints and net names).
- Broadcom SoC (BCM2711): quad-core ARM Cortex-A72 application processor with integrated GPUs and multiple high-speed interfaces (PCIe-derived USB host, Gigabit Ethernet MAC, SDIO, CSI/DSI interfaces).
- Power management: Multi-rail switching regulators and LDOs providing core, I/O, DDR and PMIC rails from a single USB-C input.
- LPDDR4 memory: two-package LPDDR4 arrays with power sequencing and targeted impedance.
- USB/Networking: PCIe-to-USB3 and USB2 hub, Gigabit Ethernet PHY and magnetics.
- Storage and boot: MicroSD interface with card-detection and optional eMMC on some variants.
- Display/camera: Dual DSI/CSI connectors with required pull-ups, clocks and level shifting.
- GPIO, HAT EEPROM, I2C/serial headers: HAT ID EEPROM, I2C, SPI, UART, PWM, and GPIO routing with protection components.
- Audio: PWM-based audio, 3.5 mm TRRS analog jack (on earlier revisions) or HDMI audio via display subsystem.
- Clocking and reset: Multiple crystal/oscillator domains, reset supervision and power-good signals.