(kicad_pcb (version 20240101) (generator pcbnew)
  (general (thickness 1.6))
  (paper "A4")
  (title_block
    (title "COMMS-HAT-SWITCH")  (date "2026") (rev "H.1")
    (comment_1 "Serenity-Class Tiltrotor UAV — 8-Node Rev H.1")
    (comment_2 "CC BY 4.0 creativecommons.org/licenses/by/4.0")
    (comment_3 "CM4 comms hat 65x52mm — Murex KSZ8895 5-port switch + CAN/RS485/1553/SiK/RCRS")
  )
  (layers
    (0 "F.Cu" signal) (1 "In1.Cu" power) (2 "In2.Cu" power) (31 "B.Cu" signal)
    (34 "B.Paste" user) (35 "F.Paste" user) (36 "B.SilkS" user) (37 "F.SilkS" user)
    (38 "B.Mask" user) (39 "F.Mask" user) (44 "Edge.Cuts" user)
  )
  (setup (pad_to_mask_clearance 0.1))
  (net 0 "")
  (net 1 "+5V")
  (net 2 "+3V3")
  (net 3 "GND")
  (net 4 "SPI0_SCK")
  (net 5 "SPI0_MOSI")
  (net 6 "SPI0_MISO")
  (net 7 "SPI0_CS_CAN")
  (net 8 "SPI0_CS_TPM")
  (net 9 "SPI0_CS_1553")
  (net 10 "SPI1_SCK")
  (net 11 "SPI1_MOSI")
  (net 12 "SPI1_MISO")
  (net 13 "SPI1_CS_ETH")
  (net 14 "UART0_TX")
  (net 15 "UART0_RX")
  (net 16 "CAN_INT")
  (net 17 "TPM_IRQ")
  (net 18 "M1553_IRQ")
  (net 19 "ETH_INT")
  (net 20 "CANH")
  (net 21 "CANL")
  (net 22 "RS485_A")
  (net 23 "RS485_B")
  (net 24 "BUS_A_P")
  (net 25 "BUS_A_N")
  (net 26 "ETH_P0_TX_P")
  (net 27 "ETH_P0_TX_N")
  (net 28 "ETH_P0_RX_P")
  (net 29 "ETH_P0_RX_N")
  (net 30 "ETH_P1_TX_P")
  (net 31 "ETH_P1_TX_N")
  (net 32 "ETH_P1_RX_P")
  (net 33 "ETH_P1_RX_N")
  (net 34 "ETH_P2_TX_P")
  (net 35 "ETH_P2_TX_N")
  (net 36 "ETH_P2_RX_P")
  (net 37 "ETH_P2_RX_N")
  (net 38 "ETH_P3_TX_P")
  (net 39 "ETH_P3_TX_N")
  (net 40 "ETH_P3_RX_P")
  (net 41 "ETH_P3_RX_N")
  (net 42 "ETH_P4_TX_P")
  (net 43 "ETH_P4_TX_N")
  (net 44 "ETH_P4_RX_P")
  (net 45 "ETH_P4_RX_N")
  (net 46 "SWITCH_MDC")
  (net 47 "SWITCH_MDIO")
  (net 48 "SD_LOG_CLK")
  (net 49 "SD_LOG_CMD")
  (net 50 "SD_LOG_D0")
  (net 51 "SIK_TX")
  (net 52 "SIK_RX")
  (net 53 "RCRS_CS")
  (net 54 "RCRS_IRQ")
  (net 55 "ISO_CAN_VCC")
  (net 56 "ISO_RS4_VCC")
  (net 57 "ISO_1553_VCC")
  (net 58 "ISO_UART_VCC")
  (gr_line (start 0 0) (end 65 0) (layer "Edge.Cuts") (width 0.05))
  (gr_line (start 65 0) (end 65 52) (layer "Edge.Cuts") (width 0.05))
  (gr_line (start 65 52) (end 0 52) (layer "Edge.Cuts") (width 0.05))
  (gr_line (start 0 52) (end 0 0) (layer "Edge.Cuts") (width 0.05))
  (footprint "MountingHole:MountingHole_2.7mm_M2.5" (layer "F.Cu") (at 3 3)
    (pad "" thru_hole circle (at 0 0) (size 2.7 2.7) (drill 2.7) (layers "*.Cu" "*.Mask")))
  (footprint "MountingHole:MountingHole_2.7mm_M2.5" (layer "F.Cu") (at 62 3)
    (pad "" thru_hole circle (at 0 0) (size 2.7 2.7) (drill 2.7) (layers "*.Cu" "*.Mask")))
  (footprint "MountingHole:MountingHole_2.7mm_M2.5" (layer "F.Cu") (at 3 49)
    (pad "" thru_hole circle (at 0 0) (size 2.7 2.7) (drill 2.7) (layers "*.Cu" "*.Mask")))
  (footprint "MountingHole:MountingHole_2.7mm_M2.5" (layer "F.Cu") (at 62 49)
    (pad "" thru_hole circle (at 0 0) (size 2.7 2.7) (drill 2.7) (layers "*.Cu" "*.Mask")))
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      (effects (font (size 0.8 0.8) (thickness 0.15))))
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      (effects (font (size 0.8 0.8) (thickness 0.15))))
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              (xy 3.75 3.75) (xy -3.75 3.75))
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    (pad "EP" smd rect (at 0 0) (size 4.50 4.50) (layers "F.Cu" "F.Paste" "F.Mask")))
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    (pad "EP" smd rect (at 0 0) (size 7.20 3.60) (layers "F.Cu" "F.Paste" "F.Mask")))
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    (pad "EP" smd rect (at 0 0) (size 7.20 3.60) (layers "F.Cu" "F.Paste" "F.Mask")))
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    (pad "EP" smd rect (at 0 0) (size 5.94 2.34) (layers "F.Cu" "F.Paste" "F.Mask")))
  (footprint "Package" (layer "F.Cu") (at 44 26) (property "Description" "4kV 4ch UART isolated SOIC-16")
    (fp_text reference "U_ISO_UART" (at 0 -3.5) (layer "F.SilkS")
      (effects (font (size 0.8 0.8) (thickness 0.15))))
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  (footprint "Package" (layer "F.Cu") (at 44 36) (property "Description" "3kV I2C FM+ isolated SO-8")
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