Fixing Missing Footprint Error

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.

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

Item	Value
Part	EM4305
Manufacturer	EM Microelectronic
MPN	EM4305
Package property	`EM4205_EM4305_EMDFN02`
Package code	`EMDFN-02`
Footprint property	`EM4205_EM4305_EMDFN02`

Datasheet findings

From the official datasheet for EM4305:

Table

Datasheet item	Value
Package name	EMDFN02
Package style	2 leads Plastic Package
Body size	2.20 mm x 1.78 mm
Thickness	0.76 mm
Tolerance note	All dimensions in mm

Pin / pad mapping found in the datasheet

Pad name	Datasheet description
Coil 2	Coil connection 2
Test	Test purpose, NC, active pad
V test 1	Test purpose, NC, active pad
V test 2	Test purpose, NC, active pad
Coil 1	Coil 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 fix	What to check
Footprint asset	A real footprint object exists, not just a footprint property string
Terminals	The part has actual terminals defined
Terminal mapping	Each terminal is mapped to the correct footprint pad
Package choice	Confirm 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 terminal	Map to footprint pad
Coil 1	Coil 1
Coil 2	Coil 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.

33 days

yanghaorun

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

33 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.

33 days

Applying changes...

0:21

33 days

Applying changes...

0:15

33 days

Applying changes...

0:19

33 days

Reviews

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Project Name

Striped Silver Heat-Ray

Description

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

Operating Voltage

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

System Architecture

Diagram

Manufact… Target

Mass production capable compact 2-layer board preferred

Operatin…perature

0C to 50C wearable outdoor use

Power R…rements

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

Connectivity

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

Reliabili…et (MTBF)

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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yanghaorun / Striped Silver Heat-Ray

Schematic