Why MAX232 IC is used in serial communication?

What is a MAX232 IC? Generally, the MAX-232 IC is used in the RS232 communication system for the conversion of voltage levels on TTL devices that are interfaced with the PC serial port and the Microcontroller. This IC is used as a hardware layer converter like to communicate two systems simultaneously.

What are line drivers such as MAX232 used for?

The MAX232 is a dual transmitter / dual receiver that typically is used to convert the RX, TX, CTS, RTS signals. The drivers provide TIA-232 voltage level outputs (about ±7.5 volts) from a single 5-volt supply by on-chip charge pumps and external capacitors.

What is RS232 and explain the 8051 connections to RS232?

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. These pins are TTL compatible; therefore, they require a line driver to make them RS232 compatible. One such line driver is the MAX232 chip.

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 with Atmel at89s51 / 52?

Usually, MAX232 consists of two line drivers for the transmission and reception of data. AT89s51/52 uses SCON and SBUF registers for serial communication. SBUF is basically a 8-bit serial communication register. For serial transmission of datas, the data is first placed in SBUF .

How does a MAX232 IC work on a PC?

Maxim Integrated Products created the MAX232 IC in 1987. It is a dual driver/receiver and typically converts the RX, TX, CTS and RTS signals from/to the PC’s serial port (which can reach up to 25 v) from/to TTL levels (5 v). With a MAX232 IC you can easily connect your PIC microcontroller to your PC. This opens up a lot of opportunities.

How does GSM interfacing with AT89C51 microcontroller work?

Interfacing of GSM to AT89C51 microcontroller uses only one transmitter and receiver. The transmitter pin T1IN of max232 is connected to the transmitter pin of the microcontroller. The receiver pin R1out of the max232 is connected to the receiver pin of the microcontroller.

How is MAX 232 used in microcontrollers?

It is used mostly to connect microcontroller with computers. MAX 232 has wide use of converting every RS232 logic level to TTL/CMOS logic and vice versa. MAX232 is also used in Modems and battery-powered systems. RS232 based cables also used to convert the data in TTL/CMOS.