HDI PCB Design for GuardX Drone

flux

I’ll inspect the existing schematic and LDK130 datasheet details, add/wire the missing strap and divider passives, then run ERC and iterate on real connectivity issues.

flux

Implemented the requested schematic fixes before credits ran out:
  • Added R_3V3_VSET = 267 kΩ, 1%, 0402.
  • Wired U_PWR1:VSET → R_3V3_VSET → GND.
  • Tied U_PWR1:MODE → GND.
  • Tied U_PWR1:STOP → GND.
  • Added LDK130 divider:
    • R_1V2_FB_TOP = 49.9 kΩ, 1%, 0402 from 1V2_CORE / U_PWR4:OUT to U_PWR4:ADJ.
    • R_1V2_FB_BOT = 100 kΩ, 1%, 0402 from U_PWR4:ADJ to GND.
    • Uses datasheet formula VOUT = VADJ × (1 + Rtop / Rbottom) with VADJ ≈ 0.8 V, producing about 1.20 V.
  • Connected R_BOOT0_PD1:P1 → U_MCU1:BOOT0; R_BOOT0_PD1:P2 was already on GND.
ERC status:
  • Regulator-related ERC check found no U_PWR warnings.
  • Remaining ERC warnings are dominated by the incomplete STM32H747 block: many MCU power pins, grounds, VCAP pins, and GPIO/peripheral pins are still floating because the full MCU power/decoupling/peripheral wiring has not been completed yet.
  • I could not continue into the STM32 power-pin matrix cleanup because credits ran out.
Wire MCU supplies
Check regulator ERC
Add VCAP caps
Check MCU datasheet
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    GuardX Beetle Drone thumbnail
    24.5 mm × 24.5 mm six-layer HDI motherboard for a micro-drone with STM32H747 control, LiPo power tree, vision, wireless telemetry, sensors, and onboard 4-in-1 ESC propulsion.

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