4.1–4.2: Add connectors (JST battery, speaker, programming header) and route 3.3 V/GND to ESP32, FM8002E, PCM5101A, W25Q64; implement I2S and SPI nets
5.1–5.2: Add USB-C CC resistors, SMBJ5.0CA, PESD5V0L2BT and wire CC, VBUS, D+/D− nets
6.1–6.2: Add pull-ups for S1 and current-limit resistors for LEDs; wire UI buttons and LEDs to ESP32
7.1–7.3: Adjust PCB outline to 96 × 55 mm, segregate power/audio zones, ensure ESP32 antenna keep-out clearance
Success criteria review
✅ 5 V boost stage parts and wiring
✅ SLM6400 + AO4407A power-path implemented
⚠️ TLV62565 decoupling & feedback network in place, but net wiring pending
⚠️ System components (ESP32, PCM5101A, FM8002E, W25Q64) integration not yet started
⚠️ USB-C and ESD/TVS protection not yet implemented
⚠️ UI buttons, LEDs, connectors not yet wired
⚠️ PCB dimensions not yet updated
Next recommended step
Proceed with net connections for the TLV62565: wire VIN to BOOST_OUT, VOUT to the 3.3 V net, GND to GND, EN to SYS, and complete the FB resistor network.