The Arduino UNO SMD R3 is a version of Arduino UNO, but it uses a surface mount version of Atmega328P instead of the through-hole version. The board is based on Atmega328. The ATmega328 provides UART TTL (5V) serial communication, which is available on digital pins 0 (RX) and 1 (TX). A CH340G on the board channels this serial communication over USB and appears as a virtual com port to software on the computer.
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Microcontroller Chip
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ATmega328 (SMD) |
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Operating Voltage
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5V |
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Input Voltage (recommended)
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7-12V |
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Input Voltage (limit)
|
6-20V |
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Digital I/O Pins
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14 (of which 6 provide PWM output) |
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PWM Digital I/O Pins
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6 |
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Analog Input Pins
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6 |
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Clock Speed
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16 MHz. |
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SRAM
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2 KB (ATmega328) |
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EEPROM
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1 KB (ATmega328P) |
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Operating Temperature (°C)
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-40 to +90 |
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Power Supply
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via DC Jack or USB |
| Arduino UNO Datasheet | Datasheet Link |
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