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Arduino UNO R4 Minima pinout

Name: Arduino UNO R4 Minima pinout with per-pin electrical limits
Creator: Xirkit

All 48 pins of the Arduino UNO R4 Minima, each mapped to the R7FA4M1AB3CFP pad it routes to, with its functions and — for 28 pins — the electrical limits from the chip datasheet. Every number cites its page and table.

48 pins documented28 with electrical limits3 control5 power out7 ground1 power in25 gpio1 analog4 debug2 nccomplete pinout

Pin table

Arduino UNO R4 Minima pins, functions and electrical limits

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VIH/VIL: input thresholds · VOH/VOL: output levels · IOH/IOL: output current. Values apply to the chip pad each pin routes to, under the conditions cited in the source.
Pin	Position	Kind	Chip pad	Functions	VIH	VIL	VOH	VOL	IOH	IOL	5 V tolerant	Abs max	Source
BOOT	JANALOG · 1	control	P201	BOOT (mode select), P201, MD	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
IOREF	JANALOG · 2	power out		power_out									p.14 table 14_1
Reset	JANALOG · 3	control	RES	RESET
+3V3	JANALOG · 4	power out		power_out									p.12
+5V	JANALOG · 5	power out		power_out									p.11
GND	JANALOG · 6	ground		ground
GND	JANALOG · 7	ground		ground
VIN	JANALOG · 8	power in		power_in									p.7 table 7_1
A0	JANALOG · 9	gpio	P014	A0, D14, DAC (DA0, 12-bit), P014, AN009, DA0	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
A1	JANALOG · 10	gpio	P000	A1, D15, OPAMP+, P000, IRQ6, AN000, AMP0+, TS21	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
A2	JANALOG · 11	gpio	P001	A2, D16, OPAMP-, P001, IRQ7, AN001, AMP0-, TS22	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
A3	JANALOG · 12	gpio	P002	A3, D17, OPAMP OUT, P002, IRQ2, AN002, AMP0O	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
A4	JANALOG · 13	gpio	P101	A4, D18, I2C SDA (Wire), P101, KR01/IRQ1, AGTEE0, GTETRGB, GTIOC5A, TXD0/MOSI0/SDA0, CTS1_RTS1/SS1, SDA1, MOSIA, AN021, CMPREF0, VL2	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
A5	JANALOG · 14	gpio	P100	A5, D19, I2C SCL (Wire), P100, KR00/IRQ2, AGTIO0, GTETRGA, GTIOC5B, RXD0/MISO0/SCL0, SCK1, SCL1, MISOA, AN022, CMPIN0, VL1	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
SCL	JDIGITAL · 1	gpio	P100	SCL, I2C SCL (Wire), P100, KR00/IRQ2, AGTIO0, GTETRGA, GTIOC5B, RXD0/MISO0/SCL0, SCK1, SCL1, MISOA, AN022, CMPIN0, VL1	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
SDA	JDIGITAL · 2	gpio	P101	SDA, I2C SDA (Wire), P101, KR01/IRQ1, AGTEE0, GTETRGB, GTIOC5A, TXD0/MOSI0/SDA0, CTS1_RTS1/SS1, SDA1, MOSIA, AN021, CMPREF0, VL2	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
AREF	JDIGITAL · 3	analog		AREF (analog reference input)
GND	JDIGITAL · 4	ground		ground
D13	JDIGITAL · 5	gpio	P111	D13, SCK, LED_BUILTIN (shared net P111), P111, IRQ4, GTIOC3A, SCK2, SCK9, RSPCKB, CAPH, TS12	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
D12	JDIGITAL · 6	gpio	P110	D12, CIPO, P110, TDI, IRQ3, GTOVLO, GTIOC1B, CRX0, CTS2_RTS2/SS2, RXD9/MISO9/SCL9, MISOB, VCOUT, SEG24	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
D11	JDIGITAL · 7	gpio	P109	D11, COPI, PWM, P109, TDO/SWO/CLKOUT, GTOVUP, GTIOC1A, CTX0, SCK1, TXD9/MOSI9/SDA9, MOSIB, SEG23, TS10	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
D10	JDIGITAL · 8	gpio	P112	D10, CS, PWM, P112, GTIOC3B, TXD2/MOSI2/SDA2, SCK1, SSLB0, SSIBCK0, CAPL, TSCAP	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
D9	JDIGITAL · 9	gpio	P303	D9, PWM, P303, GTIOC7B, SEG03/COM7, TS02	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
D8	JDIGITAL · 10	gpio	P304	D8, P304, IRQ9, GTIOC7A, SEG20, TS11	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
D7	JDIGITAL · 11	gpio	P107	D7, P107, KR07, GTIOC0A, COM3	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
D6	JDIGITAL · 12	gpio	P106	D6, PWM, P106, KR06, GTIOC0B, SSLA3, COM2	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
D5	JDIGITAL · 13	gpio	P102	D5, CANRX0, PWM, P102, KR02, AGTO0, GTOWLO, GTIOC2B, CRX0, SCK0, TXD2/MOSI2/SDA2, RSPCKA, AN020/ADTRG0, CMPIN1, VL3	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
D4	JDIGITAL · 14	gpio	P103	D4, CANTX0, P103, KR03, GTOWUP, GTIOC2A, CTX0, CTS0_RTS0/SS0, SSLA0, AN019, CMPREF1, VL4	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
D3	JDIGITAL · 15	gpio	P104	D3, PWM, external interrupt, P104, KR04/IRQ1, GTETRGB, GTIOC1B, RXD0/MISO0/SCL0, SSLA1, COM0, TS13	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
D2	JDIGITAL · 16	gpio	P105	D2, external interrupt, P105, KR05/IRQ0, GTETRGA, GTIOC1A, SSLA2, COM1, TS34	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
D1	JDIGITAL · 17	gpio	P302	D1, TX0, Serial1 TX (SCI_TXD2), P302, IRQ5, GTOUUP, GTIOC4A, TXD2/MOSI2/SDA2, SSLB3, SEG02/COM6, TS08	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
D0	JDIGITAL · 18	gpio	P301	D0, TX0, Serial1 RX (SCI_RXD2), P301, IRQ6, AGTIO0, GTOULO, GTIOC4B, RXD2/MISO2/SCL2, CTS9_RTS9/SS9, SSLB2, SEG01/COM5, TS09	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
CIPO	J1_ICSP · 1	gpio	P110	SPI CIPO, P110, TDI, IRQ3, GTOVLO, GTIOC1B, CRX0, CTS2_RTS2/SS2, RXD9/MISO9/SCL9, MISOB, VCOUT, SEG24	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
+5V	J1_ICSP · 2	power out		power_out									p.11
SCK	J1_ICSP · 3	gpio	P111	SPI SCK, P111, IRQ4, GTIOC3A, SCK2, SCK9, RSPCKB, CAPH, TS12	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
COPI	J1_ICSP · 4	gpio	P109	SPI COPI, P109, TDO/SWO/CLKOUT, GTOVUP, GTIOC1A, CTX0, SCK1, TXD9/MOSI9/SDA9, MOSIB, SEG23, TS10	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
RESET	J1_ICSP · 5	control	RES	RESET
GND	J1_ICSP · 6	ground		ground
+5V	J2_SWD · 1	power out		power_out									p.11
SWDIO	J2_SWD · 2	debug	P108	SWDIO, P108, TMS/SWDIO, GTOULO, GTIOC0B, CTS9_RTS9/SS9, SSLB0	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
GND	J2_SWD · 3	ground		ground
SWCLK	J2_SWD · 4	debug	P300	SWCLK, P300, TCK/SWCLK, GTOUUP, GTIOC0A, SSLB1	≥ 4 V	≤ 1 V	≥ 4.2 V	≤ 0.8 V	≤ -4 mA	≤ 4 mA	no	-0.3–5.3 V	R7FA4M1AB3CFM datasheet p.32 table 32_1
GND	J2_SWD · 5	ground		ground
NC	J2_SWD · 6	nc		no_connect
RX	J2_SWD · 7	debug		debug serial RX
TX	J2_SWD · 8	debug		debug serial TX
GND	J2_SWD · 9	ground		ground
NC	J2_SWD · 10	nc		no_connect

Answers from the record

Arduino UNO R4 Minima pinout FAQ

What microcontroller does the Arduino UNO R4 Minima use?

The Arduino UNO R4 Minima is built around the R7FA4M1AB3CFP, alongside ISL854102FRZ-T, PRTR5V0U2X,215, PMEG6020AELRX.

How many GPIO pins does the Arduino UNO R4 Minima have?

20 GPIO pins are exposed. Xirkit documents 48 board pins, 28 of them with pin-level electrical limits.

Are the Arduino UNO R4 Minima I/O pins 5 V tolerant?

No. The I/O pins are not 5 V tolerant — they run at 5 V logic; use a level shifter for 5 V signals. Input-high threshold: ≥ 4 V.

How much current can a Arduino UNO R4 Minima GPIO pin source?

Documented output-high current per pin: ≤ -4 mA. Values are traced to the chip datasheet; see the pinout table for per-pin limits and conditions.

What voltage powers the Arduino UNO R4 Minima?

Supply range 4.8–24 V. Power inputs: VIN (6–24 V).

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