Hardware

Rockchip Carrier Boards

Designing a carrier for a Rockchip SoM: power, high-speed routing and bring-up.

A carrier board turns a SoM into a product. It carries power input and sequencing, connectors, PHYs and any high-speed routing: PCIe, USB 3, HDMI and MIPI. Most first-spin carrier issues come from power-rail sequencing, PCIe reference clocks and resets, and MIPI lane mapping.

Key points

Match impedance for PCIe (85 Ω diff), USB 3 (90 Ω), HDMI (100 Ω) and MIPI D-PHY (100 Ω), and keep lengths matched within pairs.
Route PCIe PERST# and CLKREQ# as the module vendor specifies; the reset GPIO must match the DTS.
Plan for a debug UART header and a MaskROM button on every board revision.

Carrier Boards guides

硬件调试高级

RK3588 PCIe Not Detecting NVMe: A Step-by-Step Debug Checklist

NVMe missing from lsblk? Work through software, device tree, power/reset and signal integrity in the right order to find why the PCIe link isn't training.

9 分钟阅读 · RK3588, RK3588S, RK3568

硬件调试高级

Rockchip Ethernet PHY Debugging: RGMII Delays, MDIO and Link Problems

No link, link but no traffic, or heavy packet loss on a Rockchip GMAC? Diagnose PHY detection, RGMII timing, clocks and reset in a systematic order.

8 分钟阅读 · RK3588, RK3588S, RK3576

硬件调试中级

Rockchip USB Device Not Detected: Host, OTG, VBUS and PHY Checklist

A USB port that shows nothing in lsusb usually has a role, power or PHY problem. Here is the order to check them on Rockchip SoCs.

6 分钟阅读 · RK3588, RK3588S, RK3576

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