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Drogheda/03-Architecture-Hardware/kicad/Drogheda-v6.pretty/LCC-LGA-102_L22.0-W17.0_FM660.kicad_mod
Claude (Cowork) 3494413eaf v6 T3: Block N - ZED-F9P (U18) + low-noise LDO (U21) placed and wired 
Leo generated the vendor part with easyeda2kicad (C5120257) -> Drogheda-v6.kicad_sym /
.pretty / .3dshapes, now registered in sym-lib-table and fp-lib-table.

CROSS-CHECK: the EasyEDA/LCSC symbol independently CONFIRMS the datasheet transcription -
pads 1-54 match the u-blox pin assignment function for function, and the 21 Reserved pads
are identical. Pads 55-102 are 48 extra GND pads (the ground array under the module), which
our symbol was missing; T3a2 adds them stacked on the pin-1 coordinate so one GND label
serves all. Symbol is now 102/102 pins, footprint = Drogheda-v6:LCC-LGA-102_L22.0-W17.0_FM660.

Block N as wired (verified by rebuilding connectivity from label-on-pin geometry):
  GNSS_TX      U16.16 + U18.43        GNSS_RX  U16.17 + U18.42
  DOUT_4G      U18.26 (RXD2, RTCM in - modem end lands in T4)
  USART1_RX    U16.43 + Rdfu1.1 + U18.27 (TXD2 uplink; K1.1 also on this net per the PCB)
  GNSS_RESET_N U16.53 (PC12) + U18.49 + R105 10k pull-up to 3V3_GNSS
  GNSS_TIMEPULSE  U16.23 (PA7) + U18.53
  GNSS_ANT_DETECT U16.9 (PC1) + U18.4
  GNSS_ANT_SHORT_N U16.10 (PC2) + U18.6
  GNSS_RTK_STAT   U16.11 (PC3) + U18.20  <- hardware answer to are-corrections-being-used
  3V3_GNSS = U21.5 + U18.33/34 + C120-C124 + R105; U21 fed from SW_5V (stays MCU-gated)
  V_BCKP   = U18.36 on the UNGATED 3V3 so ephemeris survives a power-cycle
  33 no-connects: the 21 reserved pads plus V_USB, USB_DM/DP, ANT_OFF, SDA, SCL, TX_READY,
  D_SEL (open = UART mode), SAFEBOOT_N, EXTINT, GEOFENCE_STAT and the LDO NC/NR pin.

T3c fixes two coordinates the generators emitted as 3.552713679e-15 (i.e. zero); KiCad is
not guaranteed to accept exponent notation. See the script header for the lesson: a first
attempt used a bare numeric regex over the whole file and corrupted 264 UUIDs, because
segments such as 895e-4153 parse as scientific notation. Reverted from backup and redone
scoped to (at ...) forms only, with a UUID-integrity guard. Verified 2298 UUIDs, 0
malformed, 0 exponent coordinates.

STILL OPEN: the PCB has no U18/U21/passive footprints yet - that is a KiCad
Update-PCB-from-Schematic. And confirm the -04B datasheet pin assignment on paper.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YJ4eAB6zjQT49RVwpgfKdt
2026-08-24 23:25:44 +00:00

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(module easyeda2kicad:LCC-LGA-102_L22.0-W17.0_FM660 (layer F.Cu) (tedit 5DC5F6A4)
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