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FTDI US232R : USB to RS-232 cable. A USB-to-serial adapter or simply USB adapter is a type of protocol converter that is used for converting USB data signals to and from serial communications standards (serial ports). Most commonly the USB data signals are converted to either RS-232, RS-485, RS-422, or TTL-level UART serial data.
While chip manufacturers such as Prolific Technology, FTDI, Microchip, and Atmel manufacture USB chips and provide drivers that expose the chip as a virtual RS-232 device, the chips do not use USB CDC protocol and rather use their custom protocols, though there are some exceptions (PL2305 [2]).
It develops, manufactures, and supports devices and their related cables and software drivers for converting USB signals to and from various protocols, including RS-232/TTL serial (to provide support for legacy devices on modern computers lacking an accessible UART) and inter-chip communication bus protocols (e.g. SPI, I²C, JTAG, or GPIO) to ...
The standard specifies a maximum open-circuit voltage of 25 volts: signal levels of ±5 V, ±10 V, ±12 V, and ±15 V are all commonly seen depending on the voltages available to the line driver circuit. Many RS-232 driver chips have inbuilt charge pump circuitry to produce the required voltages from a 3 or 5 volt supply. RS-232 drivers and ...
A male DE-9 connector on an IBM PC compatible computer (with serial port symbol) used for an RS-232 serial port A female DE-9 connector on an RS-232 cable.. A serial port is a serial communication interface through which information transfers in or out sequentially one bit at a time. [1]
The written USB 3.0 specification was released by Intel and its partners in August 2008. The first USB 3.0 controller chips were sampled by NEC in May 2009, [4] and the first products using the USB 3.0 specification arrived in January 2010. [5] USB 3.0 connectors are generally backward compatible, but include new wiring and full-duplex operation.
Frequent use of a serial port is for a direct computer-to-computer connection. This requires an adapter called a null modem, which isn't actually a modem in the traditional sense, but rather a connector plug that simply crosses the complementary pins on two serial ports so the two sides can communicate. A null modem typically connects the DTR ...
Arduino USB v2.0 Changed: USB replaces RS-232 interface, Improved: Arduino can be powered from host Arduino Extreme [1] ATmega8 [52] 16 MHz Arduino 81.3 mm × 53.3 mm [ 3.2 in × 2.1 in ] USB The Arduino Extreme uses many more surface mount components than previous USB Arduino boards and comes with female pin headers. [1]