yanghaorun / Striped Silver Heat-Ray

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Fixing Missing Footprint Error

flux

0:44

Inspecting component info.

Reviewing the bill of materials.

Analyzing the schematic.

Running multiple web searches.

Searching for a component.

Finished searching for a component.

Found 9 results.

Found 10 results.

Found 10 results.

Looking for "Package name and package pin count for EM4305" in 4205-4305-DS-01.pdf

Looking for "Package mechanical dimensions for EMDFN-02 package" in 4205-4305-DS-01.pdf

Looking for "Pin configuration or pad connection names for EM4305 package" in 4205-4305-DS-01.pdf

Looking for "EM4305 direct antenna connection and resonant capacitor details" in 4205-4305-DS-01.pdf

Here’s what I found for U8:

What U8 currently says in your project

ItemValue
PartEM4305
ManufacturerEM Microelectronic
MPNEM4305
Package propertyEM4205_EM4305_EMDFN02
Package codeEMDFN-02
Footprint propertyEM4205_EM4305_EMDFN02
Datasheet findings
From the official datasheet for EM4305:

Table

Datasheet itemValue
Package nameEMDFN02
Package style2 leads Plastic Package
Body size2.20 mm x 1.78 mm
Thickness0.76 mm
Tolerance noteAll dimensions in mm

Pin / pad mapping found in the datasheet

Pad nameDatasheet description
Coil 2Coil connection 2
TestTest purpose, NC, active pad
V test 1Test purpose, NC, active pad
V test 2Test purpose, NC, active pad
Coil 1Coil connection 1
What this means
The likely root problem is not just missing geometry. The part definition behind U8 appears incomplete.
The library entry for EM4305 is showing 0 terminals, which strongly suggests the part project does not have a valid symbol/terminal-to-footprint setup yet. That would absolutely cause a Missing Footprints-type failure even if a text property says “Footprint”.
What to fix in the part project
For the part project of EM4305, make sure it has:

Table

Required fixWhat to check
Footprint assetA real footprint object exists, not just a footprint property string
TerminalsThe part has actual terminals defined
Terminal mappingEach terminal is mapped to the correct footprint pad
Package choiceConfirm whether you want the 2-lead EMDFN02 package or a bumped-die style implementation
Recommended next step
In the part project, verify these exact terminal mappings first:

Table

Logical terminalMap to footprint pad
Coil 1Coil 1
Coil 2Coil 2
And if you include the test pads in the footprint, keep them as NC / non-user terminals unless your exact package variant requires otherwise.
If you want, I can now give you a click-by-click checklist for rebuilding the footprint and remapping the terminals for U8.
36 days
yanghaorun

yanghaorun

Clean up U8's terminals so Coil 1 and Coil 2 map correctly, and leave test pads as NC.
36 days

flux

0:16

Evaluating project actions.

Checking if I can make the changes for you.

I can take care of that for U8: clean up its terminal properties so Coil 1 and Coil 2 are the functional terminals, and leave the test pads as NC.
If you want, apply the change and I’ll handle that specific update.
36 days

Applying changes...

0:21

36 days

Applying changes...

0:15

36 days

Applying changes...

0:19

36 days
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    Striped Silver Heat-Ray

    Striped Silver Heat-Ray thumbnail
    Compact wearable smart cat collar PCB focused on ultra-low power, miniaturized size, curved-edge waterproof-friendly mechanical fit, GNSS tracking, motion sensing, RFID compatibility, Li-ion charging, and robust mass-production readiness.

    Properties

    1-cell Li-ion/LiPo 3.0V-4.2V input, regulated 3.3V system rail

    Diagram
    


  
    
  
  
    
  


















UART

I2C

Control














"Magnetic Pogo node_5V In"
"TP4056 Charger"
"Li-ion Battery"
"AXP192 PMU"
"3.3V System Rail"
"GNSS Switched Rail"
"GD32E230 MCU"
"LIS2DH12 Accelerometer"
"EM4305 RFID"
"BC20-BD GNSS"
"SI2302 Power Switch"
"125kHz RFID Coil"
"GNSS RF Antenna"
"SWD and Test Points"

    Mass production capable compact 2-layer board preferred

    0C to 50C wearable outdoor use

    Ultra-low power wearable Li-ion system with GNSS burst activity, always-on motion sensing, RFID support, and magnetic pogo charging

    GNSS UART, I2C sensor bus, RFID LF analog front end, SWD debug, charging pads

    Wearable outdoor pet tracker with waterproof-friendly layout and robust field operation

    Pricing & Availability

    Distributor

    Qty 1

    Arrow

    $5.76–$6.84

    Digi-Key

    $6.17–$7.20

    LCSC

    $10.38–$10.48

    Mouser

    $8.36–$8.56

    TME

    $3.68–$3.80

    Verical

    $2.18–$14.15

    Controls

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