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USB to serial chip CH340 - SparkFun Electronics

The DataSheet of CH340 (the first) 1. USB to serial chip CH340 . English DataSheet Version: 1D. 1. Introduction CH340 is a USB bus convert chip and it can realize USB convert to serial interface, USB convert to IrDA infrared or USB convert to printer interface. In serial interface mode, CH340 supplies common MODEM liaison signal, used to enlarge asynchronous serial interface of computer or upgrade the common serial device to USB bus directly. More detail about USB convert to printer interface please referring to the second manual CH340DS2. In infrared mode, add infrared transceiver to CH340 can compose USB infrared adapter, realize SIR. infrared communication. UART/RS232/IrDA infrared SIR. Computer CH340 . or other USB convert USB host chip parallel printer to USB printer 2. Features Full speed USB device interface, conforms to USB Specification Version , only needs crystal and capacitance external.

asynchronous serial interface of computer or upgrade the common serial device to USB bus directly. More detail about USB convert to printer interface please referring to the second manual CH340DS2. In infrared mode, add infrared transceiver to CH340 can compose USB infrared adapter, realize SIR infrared communication. USB 2. Features

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