#Arduino nano pinout pdf serial
#Arduino nano pinout pdf driver
#Arduino nano pinout pdf plus

TX/RX LED: These LEDs indicate the functioning of the respective pins. Power port: VCCIO and GND pins supply input power to the module. UART Hardware control ports: RTS and CTS are hardware control signals for durable data connection between transmitter and receiver.

#Arduino nano pinout pdf serial

UART data transmission port: The module uses this asynchronous serial communication port for information transfer. Modem Interface Signal portД¬ontrol port: The port is responsible for power management and resetting of the module.

#Arduino nano pinout pdf plus

1 of the file this is corrected (CH340 (3) Rx pin is connected to Tx LED and (31) Tx pin of ATMega 328P, while CH340 (2) Tx pin is connected to Rx LED and (30) Rx pin of ATMega 328P вЂ“ thanks Jindra FuДЌГk to pointing this out).CP2102 USB to UART Bridge module consists of CP2102 chip, Modem Interface Signal port, Control port, UART data transmission plus control ports, power port, and built-in TX & RX LEDs.

Please note that previously there was an error in connection of pins 2&3 on CH340 вЂ“ on rev. Feel to copy and share as you like, providing you will attach the copyright info вЂњcopyright вЂќ. With load up to 25 mA the voltage dropped to 3.18-3.22 V (on different boards) however at 30 mA load the voltage dropped to 3.10 V and further to 2.85 V at 40 mA.ДЇinally, below is a link toВ schematics of the Nano CH340 R3 board in pdf. With no load, the 3V3 pin voltage was 3.28 V. There is no refence in the original CH340 datasheet or elswhere on the internet, so I measured the supplied 3V3 voltage directly. The CH340 chip includes the 3.3 V LDO voltage regulator, which can supply up to 25 mA.Rx and Tx LEDs are connected directly to the ATmega328P outputs PD0 and PD1, so keep that in mind in case those two pins will be used for something else than USB communication (on genuine Nano R3 board the Rx and Tx LEDs are driven by additional outputs on theВ FT232RL chip).For both ATmega328P and CH340, the board uses 3-pin SMD ceramic resonators with internal load capacitors, so no external capacitors for oscilating circuit are needed not they are used (although there are soldering pads providedВ next to the CH340 resonator).Differences to the genuine Arduino Nano R3 board To switch between VIN power supply (6-12 V) and USB power supply, the board includes a Schottky diode with low forward voltage.В Most of the boards I got seems to be using the Vishay SemiВ SD101CWS diode (Vf 0.6 вЂ“ 0.8 V at 20 mA, S4 SMD marking code).

With installed driver, communication with Arduino (IDE) is clear and straightforward.

#Arduino nano pinout pdf driver

The CH340 IC requires installation of driver software, whichВ was covered and explained many times already, so I will not repeat this information. To facilitate theВ USB communication and to provide 3.3 V output, the board uses USB communication circuit CH340 in SOP-16 package (instead of FT232RL used on the genuine Nano R3 board), manufactured by several Chinese companies. 500 mA of original UA78M05) and lower drop-out voltage (typ. To provide +5.0 V Vcc power supply, the board uses LM1117-5.0 SOT-223 linear stabilizer 5.0 V (compared to original UA78M05), with slightly higher current (800 mA vs. There are also 4 LEDs вЂ“ Power LED, LED connected to digital output pin D13, and two LEDs showing status of the RxD and TxD communication lines. The board uses same type of Mini-BВ USB connector, same side connectors and 6-pin SPI connector, as well as the Atmel ATmega328P microcontroller in the 32-TQFP package. The Nano CH340 R3 board is similar to the genunine Arduino Nano board, described on the original Arduino website hereВ . Below you will find both schematics and fewВ technical comments to the Nano CH340 R3 development board.В I have purchased several Nano 3.0 CH340 clones in different orders from several Asian vendors and they are all almost identical, so it seems that this type of the Nano 3.0 board is widely used. This is a case for a Chinese clones of the Arduino Nano R3 board as well.ДЄfter some research, measurements and detail inspection of the boards I was able to get together all circuits. Unfortunately, quite often there is virtually no schematics, datasheets or detail description available. Although in most cases the functionality is similar or even identical to the original, there may be some differences. Because of substantial price difference, many users are using Chinese clones of the genuine Arduino development boards.