How many serial ports does a microcontroller have?
1 Answer. Microcontroller 8051 has one serial port for communication.
What are serial ports of 8051 microcontroller?
The serial port itself monitors (through hardware) the overflow signal and at every 32nd overflow (16th if SMOD is set) a bit is transmitted. The table shows some standard Baud rates together with the required TH1 value to achieve this Baud rate with the 8051 serial port in mode 1. TH1 = 256 – counter cycle.
What is serial port and its function?
A serial port is an interface that allows a PC to transmit or receive data one bit at a time. It is one of the oldest types of interfaces and at one time was commonly used to connect printers and external modems to a PC.
What is serial port example?
An asynchronous port on the computer used to connect a serial device to the computer and capable of transmitting one bit at a time. Serial ports are usually identified on IBM compatible computers as COM (communications) ports. For example, a mouse might connect to COM1 and a modem to COM2.
What is the use of COM port?
A COM port is simply an I/O interface that enables the connection of a serial device to a computer. You may also hear COM ports referred to as serial ports. Most modern computers are not equipped with COM ports, but there are many serial port devices still in use that use the interface.
What is serial port and parallel port?
A serial port is able to transmit a single stream of data at a time. A parallel port is able to transmit multiple data streams at a time. 6. Data Sending Mechanism. A serial port sends data bit by bit after sending a bit at a time.
What is serial communication and its types?
There are two broad types of serial communication: synchronous and asynchronous. There are a very large number of different standards and protocols for serial communication, ranging from the very simple to the seriously complicated. It is important to match the right protocol with the right application.
What is another name for serial port?
The serial port is a type of connection on PCs that is used for peripherals such as mice, gaming controllers, modems, and older printers. It is sometimes called a COM port or an RS-232 port, which is its technical name.
Why do you need a serial port?
A serial port connection can be used for inter-processor communication within a system or for communication with different parts of a system. The serial port provides the physical connection between the equipment but a communication protocol has to used to ensure a reliable, error-free data path.
What is serial communication in microcontroller?
Serial communication (also called RS232 communication) enables a microcontroller to be connected to another microcontroller or to a PC using a serial cable. Some microcontrollers have built-in hardware called USART (universal synchronous-asynchronous receiver-transmitter) to implement a serial communication interface.
What are ports in microcontroller?
8051 microcontrollers have 4 I/O ports each of 8-bit, which can be configured as input or output. Hence, total 32 input/output pins allow the microcontroller to be connected with the peripheral devices. Pin configuration, i.e. the pin can be configured as 1 for input and 0 for output as per the logic state.
How many pins are there in microcontroller?
A typical microcontroller can have between 6 and 60 pins on it, to which you’re expected to attach power connections, input and output connections, and communications connections. Every microcontroller has different configurations for its pins, and often one pin will have more than one function.
How many pins are used in serial port?
Serial ports consist of two signal types: data signals and control signals. To support these signal types, as well as the signal ground, the RS-232 standard defines a 25-pin connection. However, most PC’s and UNIX platforms use a 9-pin connection.
What devices use serial port?
Serial ports are also used to connect equipment together, e.g. modems of one type or another (PSTN, 3G, satellite), GPS units, telescopes, sensors, power inverters, and many type of industrial control equipment.