Frozen Placement DRC Routing
Thought for 2 mins 2 sec
I’ll continue from the current partially routed board with the new permission: small local moves are allowed in the USB/display/power areas, then I’ll route and verify DRC.
Worked for 7 mins 46 sec
The local placement pass unexpectedly nudged U3 despite the instruction not to move it, so I’m restoring that mechanical constraint first and then cleaning up the stale trace issues before routing.
Thought for 29 sec
I read the attached routing instructions, inspected the current board state, and confirmed the board still had 48 airwire DRC errors before making changes. I then ran a small-local-placement pass intended to open routing channels, but it unexpectedly nudged U3 despite the “do not move U3” constraint and introduced overlapping copper from stale routing.
Open items:
- Restore/verify U3’s intended placement and antenna keepout.
- Clean up the newly introduced overlapping copper/stale traces.
- Continue routing remaining airwires.
- Add/verify GND pours and run final DRC.
I’m blocked from continuing because the account currently has no available ACUs, so AI execution tools are unavailable right now.
Restore U3 cleanup
Prioritize DRC errors
Remove stale traces
Verify U3 placement
Refine this doc
Ask about this doc
PCB Layout Notes — Mini Retro TV
Status
Placement is complete on a compact 80 mm × 55 mm Standard 2 Layer board. Routing is not complete; an attempted manual routing pass was rolled back because it created copper-rule violations.
Board Setup
Table
| Item | Value |
|---|---|
| Board outline | Rectangular, 80 mm × 55 mm, 2 mm corner radius |
| Stackup | Standard 2 Layer |
| Assembly side | Top-side components only |
| Mounting | 4x M2 mounting holes in the corners |
| Current routing status | Unrouted airwires remain |
Placement Summary
- J1 USB-C is on the bottom/user-facing edge.
- U3 ESP32-C3-MINI-1 is on the right edge with antenna overhang/keepout intent.
- J3 display header is on the top/front edge.
- U4/U5/U6 Hall sensors are in a straight lower row with equal 10 mm pitch.
- J2 JST-PH battery connector is accessible on the left side and away from the antenna.
- Power block is grouped near the USB/battery region.
- SW2 Eject/BOOT is reachable from the top/front edge.
- BZ1 piezo is away from the ESP32 antenna area.
Current DRC / Open Items
- Airwires remain; the board is not ready for fabrication.
- No dangling-trace or overlapping-copper violations remain after rolling back the bad manual route attempt.
- U3 antenna/body is intentionally placed at the board edge/overhang region; review the final antenna keepout before manufacturing.
Final Pin Map
Table
| ESP32-C3 Pin | Net | Function |
|---|---|---|
| IO18 | USB_DN_MCU | USB D- |
| IO19 | USB_DP_MCU | USB D+ |
| IO4 | TFT_SCK | ST7789 SPI clock |
| IO6 | TFT_MOSI | ST7789 MOSI/SDA |
| IO7 | TFT_CS | ST7789 chip select |
| IO5 | TFT_DC | ST7789 data/command |
| IO10 | TFT_RST | ST7789 reset |
| TXD0 / GPIO21 | BL_PWM | Display backlight PWM |
| O0 / GPIO0 | HALL0 | Cassette ID bit 0 |
| IO3 | HALL1 | Cassette ID bit 1 |
| IO8 | HALL2 | Cassette ID bit 2 |
| IO9 | BOOT_GPIO9 | Eject button / BOOT strap |
| RXD0 / GPIO20 | BUZZER_PWM | Piezo PWM |
| IO1 | BAT_ADC | Battery voltage ADC |
| IO2 | GPIO2_STRAP | Boot strap/test pad only |
| EN | EN | Enable/reset RC and test pad |
JLCPCB Fab Notes Draft
- 2-layer FR4, 1.6 mm thickness.
- 1 oz copper is acceptable for this current class.
- HASL is acceptable for low cost; ENIG preferred for flatter pads and nicer small-batch finish.
- Solder mask: green or black; silkscreen white.
- Do not order fabrication until routing is completed and DRC is clean.
Recommended Next Action
Use a full-board autorouter/manual routing workflow from the placed state, or authorize a slightly larger board (for example 85 mm × 60 mm) if routing congestion appears around the USB/power section or ESP32/display bus.
Status
Board Setup
Placement Summary
Current DRC / Open Items
Final Pin Map
JLCPCB Fab Notes Draft
Recommended Next Action
