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How do you communicate with PC using RS232 protocol explain briefly?
Function of pins required for serial communication are explained below.
- 1.CD/DCD (CARRIER DETECT/ DATA CARRIER DETECT)
- RxD (Receiver Pin)
- TxD (Transmission Pin)
- DTR (Data Terminal Ready)
- GND (Signal Ground)
- DSR (Data Set Ready)
- RTS (Request To Send)
- CTS (Clear To Send)
What is an RS232 cable used for?
In addition to communications between computer equipment over telephone lines, RS-232 protocol is now widely used for connections between data acquisition devices and computer systems. As in the definition of RS232, the computer is data transmission equipment (DTE).
How does RS-232 to USB work?
USB to serial adapters are cables that convert the data sent by a serial-enabled device for use by a USB port. The serial end has a DB9 connector, which plugs into the serial device. The software creates a virtual serial port. As data are transmitted through the USB port, they come in as a serial signal.
What do you need to know about PCB grounding?
We normally talk about signal integrity in terms of high speed and high frequency signals, but any PCB needs to have a stable ground to ensure signals are clean and noise-free. Proper grounding comprises routing return signals to a ground point, and properly designing ground planes.
Where to place ground vias in a PCB?
As a rule of thumb, these ground vias must be placed at 1/8th of a wavelength or less from the relevant conductor. In a multilayer PCB, the arrangement of power, signal, and ground layers in the stack has major effects on signal integrity and will influence your routing strategy.
How are ground planes connected in a PCB?
Ground Vias In a multilayer board, ground planes on different layers are connected through vias. These connections help you access the ground plane anywhere throughout the PCB. Vias also help reduce the ground loops in the system.
How are ground planes connected in a multilayer board?
In a multilayer board, ground planes on different layers are connected through vias. These connections help you access the ground plane anywhere throughout the PCB. Vias also help reduce the ground loops in the system. They provide a shorter return path for the current through a low impedance ground point.