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CH341A Datasheet(Folha de dados) 13 Page - List of Unclassifed Manufacturers

Nome de Peças. CH341A
descrição  CH341 is a USB bus convert chip, providing UART, printer port, parallel and synchronous serial with 2-wire or 4-wire through USB bus
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Fbricantes  ETC2 [List of Unclassifed Manufacturers]
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The DataSheet of CH341 (the first)
13
7.4.USB change to 3-wire RS232 serial interface (consult the following picture)
The following picture describes the USB change to RS232 serial interface, and the P6 is needle of DB9.
The 3-wire serial interface is basic and common asynchronous serial interface.
7.5.USB change to RS485 interface (consult the following picture)
Crystal, oscillate capacitance and power decoupling capacitance can refer to basic connection picture.
TEN# is connected to ground directly allowing CH341 transfer data through serial interface. TNOW controls
bus semi-duplex transceiver U5 of RS485.
7.6.Connection MCU serial interface (consult the following picture)




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