Schematic for R7FA4M1AB3CFM General Design (USB C&SD Card): This...

MicroSD Connector Pinout Details

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Here are the pin descriptions for J2 (TF-015 MicroSD/TF Card Connector):

Table

Pin No.	Pin Name	Type	Function	I/O Characteristics	Special Considerations
1	DAT2	I/O/PP	Data Line [Bit 2]	I/O, push-pull	Ensure correct signal level matching.
2	CD/DAT3	I/O/PP	Card Detect / Data Line [Bit 3]	I/O, push-pull	Also used for card-detection in some systems. Pull-up may be needed.
3	CMD	PP	Command/Response	Push-pull	Specialized command channel. Use as per SDIO protocols.
4	VDD	S	Supply Voltage	Supply	Typically 2.7–3.6 V for MicroSD.
5	CLX	I	Clock	Input	Keep traces short and well-matched for signal integrity.
6	VSS	S	Supply Voltage Ground	Supply	Connect to system ground.
7	DAT0	I/O/PP	Data Line [Bit 0]	I/O, push-pull	Main data channel.
8	DAT1	I/O/PP	Data Line [Bit 1]	I/O, push-pull	Used for 4-bit mode.

Legend:

I/O/PP = Input/Output, Push-Pull
PP = Push-Pull
S = Supply
I = Input

General Notes:

All I/O pins are typically 3.3V logic (unless using lower-voltage cards—check card specs).
CMD and CLK (CLX) lines should be routed carefully to prevent noise and maintain SD specification requirements.
Some designs use DAT3/CD for card detect; otherwise, tie high with a pull-up if not used for detection.
Pull-up resistors (10-50kΩ) are recommended on DAT[3:0], CMD for standard operation.
Refer to the SD/MMC protocol requirements for proper card initialization and communication.

For more, see the full TF-015 MicroSD connector datasheet (PDF).

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VCC

Resistance

0 Ω

Capacitance

0.1u F

VCC

TMS/SWDIO

Capacitance

22p F

Resistance

0 Ω

Capacitance

4.7u F

I2C_SDA

Capacitance

1u F

SPI_CS1

RESET

SPI_MISO

Capacitance

22p F

Resistance

5.1K Ω

USB_DM

SPI_SCK

C10

Capacitance

10u F

Capacitance

22p F

SPI_MISO

USB_DM

RESET

Capacitance

22p F

Capacitance

10u F

VCC

SPI_MOSI

Resistance

10K Ω

VCC

USB_DP

TCK/SWCLK

C12

Capacitance

0.1u F

Frequency

x Hz

VCC

I2C_SCL

VCC

Frequency

x Hz

VUSB

SPI_SCK

VCC

SPI_MOSI

SPI_CS1

Resistance

0 Ω

Resistance

0 Ω

Capacitance

4.7n F

USB_DP

Reviews

Electrical Rule Checks

Missing Footprints

Reports parts that have no footprint.

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 • 17

	Designator	Ruleset
	Fab Shapes	Y2 Fab Shapes
	Fab Shapes	Y1 Fab Shapes
	＊｀REF｀＊	C9
	＊｀REF｀＊	C7
	＊｀REF｀＊	C1
	＊｀REF｀＊	R4
	＊｀REF｀＊	R7
	＊｀REF｀＊	C3
	＊｀REF｀＊	C6
	＊｀REF｀＊	R5
	＊｀REF｀＊	U2
	＊｀REF｀＊	C11
	＊｀REF｀＊	C5
	＊｀REF｀＊	C4
	＊｀REF｀＊	R1
	＊｀REF｀＊	R6
	＊｀REF｀＊	C2

Airwires • 1

	Designators	Net
	Trace a6f2:Trace a6f2, U1:AVCC0	GND

Deprecated Rules

Reports nodes that are using rules that are not supported anymore.

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.

Manufacturing

Manufacturer Part Number • 21

	Designator	MPN
	C1	None
	C2	None
	C3	None
	C4	None
	C5	None
	C6	None
	C7	None
	C8	None
	C9	None
	C10	None
	C11	None
	C12	None
	R1	None
	R2	None
	R3	None
	R4	None
	R5	None
	R6	None
	R7	None
	Y1	None
	Y2	None

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Passive Components

Resistor Power Rating

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

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Pull Up/Pull Down Presence

Beta

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

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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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20.5M
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43.0M
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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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11.4M
Generic Resistor
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
jharwinbarrozo
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
jharwinbarrozo
15.1k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
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
jharwinbarrozo
1.2M
CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
jharwinbarrozo
1.1M

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R7FA4M1AB3CFM General Design (USB C&SD Card)

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License

https://creativecommons.org/licenses/by/4.0/

Availability & Pricing

Distributor		Qty 1
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	LCSC	$7.38–$7.45
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