Resolving Copper DRC Errors
Thought for 7 sec
I can’t cancel that server-side auto-layout job from the chat tools. You’ll need to discard it manually in the Flux UI job/auto-layout panel.
Once it is cleared, send:
rerun focused route
Then I’ll run exactly:
- one routing attempt
- one DRC count check
- stop immediately.
rerun focused route
Thought for 8 sec
I’ll run exactly one routing attempt, then one DRC count check, and stop.
Worked for 47 sec
Routing attempt failed: the same stuck
outOfCredit job is still active.Final DRC count check: 130 items remain.
Inspect stuck job
Manual USB routing
Check USB placement
Generate Rev A docs
Review export readiness
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Project Specification — HyperPulse Blade 2
Overview
HyperPulse Blade 2 is an ultra-compact athletic performance wearable worn on the body during sport. The target PCB is 30 mm × 22 mm on a 4-layer stackup, but the layout goal is to reduce below 30 mm × 22 mm if legal DFM clearances allow.
Core Architecture
- Primary processor: Nordic nRF5340 QFN-94 / 7 mm × 7 mm dual-core BLE SoC.
- BLE RF path: external stub antenna through U.FL connector.
- Sensors: ICM-42688-P IMU over SPI, MMC5983MA magnetometer over I2C, BMP390 pressure/temperature over I2C, MAX30102 heart-rate/SpO2 over I2C, u-blox MAX-M10S GPS over UART.
- GPS RF path: external ceramic patch antenna through U.FL connector.
- Power: 250 mAh single-cell LiPo, Qi wireless charging receiver, BQ25180 1S LiPo charger/power-path, 3.3 V LDO rail for MCU IO and sensors.
- User interface: BQ25180 push-button wake/ship-mode control, BLE/status LED, and charge-status LED.
Requirements
Table
| ID | Requirement | Value / Target |
|---|---|---|
| MECH-001 | Initial board size | 30 mm × 22 mm target ceiling |
| MECH-002 | Minimum size goal | Shrink below 30 mm × 22 mm if component fit and DFM clearances allow |
| MECH-003 | Component sides | Populate both top and bottom layers to minimize area |
| PCB-001 | Layer count | 4 layers |
| PCB-002 | Board thickness | Target 0.8 mm total PCB thickness |
| PCB-003 | Package strategy | Smallest available package for every component; QFN/LGA/CSP/BGA preferred; 0402/0201 passives preferred |
| PWR-001 | Battery | 1S LiPo, 250 mAh, 3.7 V nominal |
| PWR-002 | Charging | Wireless Qi only, no USB port |
| PWR-003 | Power control | Physical momentary button to BQ25180 PB/TS-MR function; firmware soft power control; no extra power IC |
| PWR-004 | Sleep current | 10 s hold enters ship mode |
| UI-002 | BLE/status LED | Blue indicator controlled by nRF5340 GPIO with ~2 mA resistor target |
| UI-003 | Charge LED | Red or red/green charge indicator driven by BQ25180 STAT/~INT-class output with ~2 mA resistor target |
| RF-001 | BLE antenna | U.FL to external stub antenna |
| RF-002 | GPS antenna | U.FL to external ceramic patch antenna |
| RF-003 | RF layout | Maintain BLE/GPS antenna separation, short 50 Ω RF launches, solid return path, and no noisy power routing under RF sections |
| OPT-001 | MAX30102 placement | Requires optical window, skin-facing placement, light isolation from ambient and LEDs |
| DEC-001 | Decoupling | Robust local decoupling on MCU, GPS, PMIC, and every sensor power rail |
| AREA-001 | Board-area goal | Maximize sensor density per cubic millimeter |
Placement Constraints to Carry into Layout
- MAX30102 must be placed on the skin-facing side, aligned to the optical window, with mechanical light isolation/gasket around the LEDs/photodiode.
- Power button must sit on a board edge, aligned to a pinhole or flexure in the enclosure.
- Indicator LEDs must sit on the top-side board edge and align to small optical windows/light pipes.
- GPS U.FL and antenna feed should be separated from the BLE U.FL/feed; avoid routing the two RF feeds in parallel and preserve 50 Ω controlled-impedance geometry.
- GPS antenna should be kept away from the Qi receiver coil, high-current charging paths, and noisy digital clocks.
- BLE antenna U.FL should be edge-accessible with a short RF path and keepout around the connector/launch.
- IMU should be mechanically near the board/body reference center where possible, away from flexing edges and high-vibration connectors.
- Magnetometer should be kept away from the Qi coil, battery current paths, inductors, magnets, and ferrous hardware.
- Qi coil and BQ51013B receiver section need their own keepout/noise-control region away from GPS and magnetometer.
Size Bottlenecks / Alternatives to Evaluate
Table
| Component | Bottleneck | Smaller Alternative Path |
|---|---|---|
| nRF5340 QFN-94 | Unavoidable 7 mm × 7 mm primary IC | None per requirement |
| MAX-M10S | ~9.7 mm × 10.1 mm GNSS module dominates board area | Evaluate smaller GNSS modules or chipset-only design if schedule/RF validation allows |
| U.FL connectors | Two coax connectors consume edge length/height | MHF4 connectors are smaller if antenna cable ecosystem can change |
| SKRPACE010 library footprint | Available library footprint is ~4.2 mm × 3.2 mm, larger than requested 3.2 mm × 2.3 mm | Import/create verified smaller tactile switch footprint if exact alternate is selected |
| Qi receiver coil | Coil/mechanical stack dominates thickness and area | Custom thin flexible receiver coil may be required |
| 0603 LEDs in current library | Exact 0402 color LED matches not found | Import/create verified 0402 LEDs from selected MPNs |
Power Budget — Initial Sizing
Estimated active peaks are BLE/nRF5340 ~20 mA, GPS acquisition/tracking ~25–30 mA, MAX30102 LED pulses up to tens of mA depending LED current, IMU/magnetometer/barometer <5 mA combined, plus LDO/PMIC overhead. Size the 3.3 V LDO for at least 150 mA peak with low IQ suitable for <50 µA sleep.
Design Notes / Open Decisions
- Final pin mapping should prioritize SPI for ICM-42688-P, shared I2C for MMC5983MA/BMP390/MAX30102, UART for MAX-M10S, and GPIO for BLE status LED.
- Add SWD pads/test points despite no USB port, otherwise firmware bring-up is high risk.
- Qi receiver coil geometry and placement will need mechanical integration and shielding review during layout.
- Actual minimum board dimensions require placement feasibility after schematic wiring and footprint placement; preliminary bottleneck is MAX-M10S + nRF5340 + two U.FL connectors + Qi coil area.
Overview
Core Architecture
Requirements
Placement Constraints to Carry into Layout
Size Bottlenecks / Alternatives to Evaluate
Power Budget — Initial Sizing
Design Notes / Open Decisions
