Schematic Symbol for Seeed Studio XIAO nRF52840: XIAO nRF52840...

PCB Design Assistance

flux

2:20

General

Chat History

Project

Plan

Planning tool execution.

Identifying distinct intents.

Crafting a minimal plan.

Linking components in plan mode.

Creating a comprehensive plan.

Executing in plan mode.

I’ve created a plan to build your schematic and 30 x 20 mm, 2‑layer PCB exactly per your netlist and constraints.

What will happen

Add and wire: Seeed Studio XIAO nRF52840, LMP91000 WSON‑14, JST‑PH‑2, 3 edge Solder Pad WE/RE/CE, passives (2× 4.7k Resistor, 100 Ohm Resistor, 2× 100nF Capacitor, 1uF Capacitor, Test Pad).
Wire nets: BAT+->XIAO BAT, BAT−->GND; 3V3->LMP VDD; SDA/SCL with 4.7 kΩ pull‑ups to 3V3; LMP VOUT->100 Ω->XIAO A0 + VOUT test pad; WE/RE/CE -> LMP WE/RE/CE; all grounds common.
PCB: set board to 30 x 20 mm (2‑layer, target 0.8 mm), reserve antenna no‑copper region, place LMP91000 tight to pads, keep VOUT short and away from I2C, enable GND pour.

Please try clicking Start on the plan bar now. If it’s still disabled, try a page refresh. If it remains unavailable, I can proceed by executing the same steps directly for you—just say “Proceed without Start,” and I’ll begin.

a day

letsgettoityuh

Is it not able to start because the part has 6 reviews on it? Like where it has an X on it by electrical rule checks

a day

flux

2:56

General

Chat History

Project

Help

Knowledge Base

Review (ERC/DRC)

Clarifying plan execution issues.

Proposing resolution steps.

Focusing on UI and reviews.

Planning to use the @action tool.

Using Knowledge Base Tool.

Using Review (ERC/DRC) Tool.

Reading docs for: "Why is the Start button in the plan bar disabled? Do ERC/DRC review errors prevent running AI plans or edits? How to enable and run a plan, and alternatives if Start is unavailable."

Determining next steps.

Short answer: No—Electrical Rule Check (ERC) issues don’t block starting or running a plan.

What Flux docs say about running plans "Flux creates a step-by-step plan before making changes — so you’re always in control… Approve to execute. Once you’re happy with the plan, hit Start. Flux will carry out the changes in the Flux Editor exactly as described — no surprises." Source

What I see in your Reviews

Electrical Rule Checks are currently showing errors (duplicate designators and missing power pins), which explains the red X and the count. These checks are advisory for design quality; they do not disable the Start control.

If Start is still disabled, it’s unrelated to those ERC items. Want me to proceed with the schematic and layout changes directly for you?

Check why Start disabled

Fix duplicate designators

Resolve missing power U2

Inspect ERC error details

Confirm project permissions

a day

Ready to start.

Show Plan

what does this pin do?

mirceadaneliuc

@copilot what does this pin do?

11mo

copilot

Could you please specify which pin you're referring to? There are several pins listed in your project description, and I'll provide details on the functionality or common usage of the pin you mention.

11mo

mirceadaneliuc

D10_MOSI pin

11mo

copilot

The D10_MOSI_P1.15 pin serves as the Master Output Slave Input (MOSI) pin in the Serial Peripheral Interface (SPI) communication protocol. Here's a bit more detail:

MOSI (Master Output Slave Input): This line carries data sent from the master device to the slave device in an SPI setup. When the microcontroller is configured as an SPI master, MOSI is used to transmit data to peripherals, such as slaves. When the microcontroller acts as a slave, it receives data on this pin.

If you need more information on using this pin in your specific project, feel free to ask!

11mo

Someone is typing...

is the 5V an output pin?

mirceadaneliuc

@copilot is the 5V an output pin?

11mo

copilot

In the context of the Seeed Studio XIAO nRF52840, the 5V pin is typically used as a power input. It allows you to power the board using an external 5V power source. This pin is often used to supply power to the board from sources like USB power.

If you intended to use the 5V pin as an output, it's important to consult the specific documentation or datasheets for the Seeed Studio XIAO nRF52840 to confirm its capabilities. However, in typical scenarios for microcontroller boards, the 5V pin is primarily an input. If you have a specific use case in mind, feel free to share it!

11mo

Someone is typing...

is this an output pin?

mirceadaneliuc

@copilot is this an output pin?

11mo

copilot

You've shared a project with various pins, but without specifying which pin you're referring to, it's challenging to determine if a particular pin is an output. Output pins are typically labeled according to their function in the microcontroller's datasheet or pinout specification.

If you're asking about a specific pin from the Seeed Studio XIAO nRF52840, typically pins with designations like TX, MISO, or MOSI are output pins in specific modes (UART, SPI, etc.). For instance:

P1.11_TX_D6 could be configured as a transmitter (TX) in UART mode.

To provide a definitive answer, I would need to know the specific pin you are referring to and the intended configuration or mode of operation. Let me know which pin you're curious about!

11mo

Someone is typing...

GND

P0.29_A3_D3

P0.03_A1_D1

RST

U2 GND - GND GND

P0.05_SCL_A5_D5

3V3

P0.28_A2_D2

GND

P0.02_A0_D0

D9_MISO_P1.14

CLK

NFC 1

P1.11_TX_D6

D7_RX_P1.12

DIO

GND

BAT-

BAT+

NFC 2

D10_MOSI_P1.15

D8_SCK_P1.13

P0.04_SDA_A4_D4

Reviews

Electrical Rule Checks

Duplicate Designators • 4

	Components
	GND, GND
	R2, R2
	R1, R1
	U2, U2

No-Connect Violation

Reports no-connect pins that are connected.

Missing Power • 2

	Component
	LIS3DH U2
	LIS3DH U2

Single Pin Nets

Reports nets that have only one pin connected.

Missing Designator

Reports components without a designator.

Design Rule Checks

Overlapping Copper

Reports copper elements that are shorting.

Invalid Layer

Reports nodes that are assigned to a layer that doesn't exist in the layout stackup.

Component Overrides

Reports components that have been modified using the "!important" flag.

Airwires

Reports missing routed traces between pads in a net.

Layers with Multiple Fills

Reports layers that have multiple copper fills of different nets. Make sure the Connected Layers rule value of nets with fills is valid.

Floating Copper

Detect any via, trace or copper fill island that is not connected to any net.

Protected Intrusions

Reports intrusions from objects of other nets into polygons or fills that have the Protected layout rule applied.

Missing Footprints

Reports components that need a footprint but don't have one.

Manufacturing

Manufacturer Part Number

Reports components that have no manufacturer part number.

Parts Available

Beta

Checks that all components are available from distributors.

System Checks

Auto-Layout

Beta

Reports issues with Auto-Layout if Flux cannot route something or must ignore a configuration.

Passive Components

Resistor Power Rating

Beta

Checks that the power traveling across a given resistor is under its rating with 50% headroom.

Learn more

Pull Up/Pull Down Presence

Beta

Checks that IC pins that require pull up or pull down resistors have them.

Learn more

Capacitor Voltage Rating

Beta

Checks that capacitors have appropriate voltage ratings to prevent overheating and ensure reliable circuit operation.

Ground
A common return path for electric current. Commonly known as ground.
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Net Portal
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Power Net Portal
Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
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A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibrary
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1.5M
Generic Capacitor
A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibrary
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1.5M
Generic Inductor
A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #generics
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15.1k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
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RMCF0805JT47K0
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
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1.2M
875105359001
10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
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1.2M
CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
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1.1M