What is RS232 explain its pin diagram?
CD- Carrier Detect, signal from DCE to DTE. Indicates that modem (DCE) is busy i.e. already using the line. RI- Signal from DCE to DTE, Modem (DCE) detects ring from line….RS232 technical specifications.
| Specifications | RS232 |
|---|---|
| Max. driver current in high impedance state | +/-6mA at +/-2V |
| slew rate(max) | 30 V/µS |
What is the use of MAX3232?
MAX3232 IC is extensively used for serial communication in between Microcontroller and a computer for changing the TTL/CMOS logic levels to RS232. So, if we want to interface any microcontroller with the Computer, first we have to convert the logic of TTL/CMOS to RS232.
What is RS232 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.
How does MAX232 work?
MAX232 offers a intermediate link between the Microcontroller and your PC. The transmitters of this IC will convert the TTL/CMOS input level into RS232 voltage levels. The receiver pins are capable of taking input around -30V to +30V.
Why do we use MAX232?
MAX232 IC is widely used for serial communication among Microcontrollers & PC. The main function of this integrated circuit is to change the logic levels of TTL/CMOS to RS232 throughout the serial communication process.
What is the need for MAX232?
What is the RS232 interface and how does it work?
RS232 is a standard protocol used for serial communication, it is used for connecting computer and its peripheral devices to allow serial data exchange between them. As it obtains the voltage for the path used for the data exchange between the devices.
Why capacitors are used in MAX232?
RS232 can range from +/-10V to +/-15V from what I’ve seen, and the MAX232 is used to convert from TTL levels coming from / going to a microcontroller, so its charge pumps needs the caps to get to the right voltage.
What is RS232 and explain its interfacing with 8051?
The microcontroller AT89C51 has an inbuilt UART for carrying out serial communication. The serial communication is done in the asynchronous mode….How to interface computer’s Serial Port (RS232) with 8051 microcontroller (AT89C51)- (Part 21/45)
| Bit | Voltage Range (in V) | |
|---|---|---|
| 0 | +3 | +25 |
| 1 | -25 | -3 |
What is RS232 and explain the 8051 connections to RS232?
The interfacing of 8051 with RS232 connectors via the MAX232 chip is the main topic of this section. The 8051 has two pins that are used specifically for transferring and receiving data serially. These two pins are called TxD and RxD and are part of the port 3 group (P3. 0 and P3.
Why is MAX232 needed?
What is MAX232 IC?
What is MAX232 IC? MAX232 IC is widely used for serial communication among Microcontrollers & PC. The main function of this integrated circuit is to change the logic levels of TTL/CMOS to RS232 throughout the serial communication process.
How many RS-232 signals can The MAX232 (A) convert?
The MAX232 (A) has two receivers that convert from RS-232 to TTL voltage levels, and two drivers that convert from TTL logic to RS-232 voltage levels. As a result, only two out of all RS-232 signals can be converted in each direction.
What is the function of the RS232 integrated circuit?
The main function of this integrated circuit is to change the logic levels of TTL/CMOS to RS232 throughout the serial communication process. Generally, a microcontroller works at TTL of about 0 to 5V while a computer operates on the standards of RS232 like -25 to +25V.
What do the colors on the MAX232 pinout mean?
MAX232 pinout: Red: power, Blue: outputs, Green: inputs, Yellow: capacitors The MAX232 is an integrated circuit first created in 1987 by Maxim Integrated Products that converts signals from a TIA-232 (RS-232) serial port to signals suitable for use in TTL -compatible digital logic circuits.