Arduino-uno-schematic PDF

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Arduino UNO Reference Design Reference Designs ARE PROVIDED "AS IS" AND "WITH ALL FAULTS". Arduino DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, REGARDING PRODUCTS, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE

IC1 3

U1A

7

1

GATE_CMD +5V

USBVCC

IC2 GND MC33269D-5.0

VIN D1 M7 PC1 47u

PWRIN

+5V

3

VO

VI ADJ

GND

GND

+5V

2 +

1

GND

GND

3

3

1

4

MC33269ST-5.0T3 +5V

LM358D

1

10K 8 RN1A 1

LM358D

GND

4 2

6

2

+

8

+3V3 C1 100n

IN OUT

U1B

5

1

3

2

CMP

2

7 2

+5V

RN1B 10K

Arduino may make changes to specifications and product descriptions at any time, without notice. The Customer must not rely on the absence or characteristics of any features or instructions marked "reserved" or "undefined." Arduino reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them. The product information on the Web Site or Materials is subject to change without notice. Do not finalize a design with this information. VIN

PC2 C2 47u 100n

GND

GND

GND 5 +3V3

+5V

C3 1u

POWER

+5V

1

+5V

R3 27R

XT1R 32

100n C7

2

1

(INT4/ICP1/CLK0)PC7 (OC1A/PCINT8)PC6 (PCINT9/OC1B)PC5 (PCINT10)PC4 (AIN2/PCINT11)PC2

VCC GND

27 31 30 29 28

UCAP UVCC DD+ UGND

EXP

GROUND

PAD

(CTS/HWB/AIN6/TO/INT7)PD7 (RTS/AIN5/INT6)PD6 (XCK/AIN4/PCINT12)PD5 (INT5/AIN3)PD4 (TXD1/INT3)PD3 (RXD1/AIN1/INT2)PD2 (AIN0/INT1)PD1 (OC0B/INT0)PD0

22 23 25 26 5

+5V 5 4

RESET Y2

GND

16MHz

+5V

13 12 11 TXLED 10 RXLED 9 M8RXD 8 M8TXD 7 6

1

UBOOT 2

USB boot En 1K 5 RN2D 4

C6 100n +5V

RESET

10

XTAL2

9

XTAL1

21 20 22 7 8

AREF AVCC AGND VCC GND

1K 6 RN2C 3

XTAL2

(ADC5)PC5 (ADC4)PC4 (ADC3)PC3 (ADC2)PC2 (ADC1)PC1 (ADC0)PC0)

ATMEGA8 1K RN4B 7 2 M8RXD M8TXD

GND

2 1

Q2

16MHz

2 1

Q1

C11 22p

XT2

16MHz

XTAL1

C10 22p

XT1

C12 22p

C9 22p

RX YELLOW

(SCK)PB5 (MISO)PB4 (MOSI)PB3 (SS)PB2 (OC1)PB1 (ICP)PB0

(AIN1)PD7 (AIN0)PD6 (T1)PD5 (T0)PD4 (INT1)PD3 (INT0)PD2 (TXD)PD1 (RXD)PD0

GND

TX YELLOW

ATMEGA8U2-MU

8

2 4 6

GND

ZIC1 1

XTAL2 R2 1M XTAL1 AREF

1 3 5

ICSP

RN1D 10K

100n

C5

21 20 19 18 17 MISO2 16 MOSI2 15 SCK2 14

2

GND

GND

C8 1u

XTAL1

AVCC

4 3

VUCAP USBVCC RDRD+ UGND

GND

XTAL2(PC0)

Y1 XT1 16MHz

USHIELD BLM21

2

GND

R1 RD- 1M 22R 5 RN3D 4 RD+ PGB1010604

Z1

PGB1010604 Z2

UGND

DD+

3 4

RESET TS42 XT2

(PCINT7/OC0A/OC1C)PB7 (PCINT6)PB6 (PCINT5)PB5 (T1/PCINT4)PB4 (PD0/MISO/PCINT3)PB3 (PDI/MOSI/PCINT2)PB2 (SCLK/PCINT1)PB1 (SS/PCINT0)PB0

RESET(PC1/DW)

USBVCC 22R 8 RN3A 1

XUSB

L1

USB

P$2 P$1 P$2 P$1

1 2 3 4

24

RESET2

500mA

X2

U3

RESET-EN

DTR

GND

1

+5V

GND ICSP

1 2 5

10K 6 RN1C 3

2 4 6

ICSP

F1

4

GND

ICSP1 1 3 5

+5V GND

1K 8 RN4A 1

19 18 17 16 15 14

SS IO9 IO8

28 27 26 25 24 23

AD5 AD4 AD3 AD2 AD1 AD0

13 12 11 6 5 4 3 2

3

GND

GREEN ON

6

RN4C 1K

C4 100n

AREF GND SCK MISO MOSI SS

8 7 6 5 4 3 2 1

13 12 11 10 9 8

IOH 6 5 4 3 2 1

2

8 7 6 5 4 3 2 1

IOL

7

RN3B 22R 3

6

RN3C 22R

AD IO7 IO6 IO5 IO4 IO3 IO2 IO1 IO0

5

RN4D 1K

GND

VIN

GND

1 2 3 4 5 6

2

+3V3

1K

RESET

GND

1K RN2B

4

7

EN GND NC/FB

YELLOW L

OUT

1

T1 FDN304V

3 2

IN

RN2A

1

7 6 5 4 3 2 1 0...