Circuit RS 232

Week no: week 5 (4/9/2012)

Objective:  Investigate the circuit of RS232

Content:

Serial port RS 232 is a standard for serial binary data signals connecting between Data Terminal equipment (DTE) and a Data Circuit terminating equipment (DCE). It is commonly used in computer serial ports. Details  of character format and transmission bit rate are controlled by the serial port hardware often a single integrated circuit ca;;ed a Universal Asynchronous Receiver/Transmitter (UART) that converts data from parallel to asynchronous start stop serial form. Details of voltage levels, slew rate, and short circuit behavior are typically controlled by a line driver that converts from the UART logic level to RS 232 compatible signal levels, and a receiver that converts from RS232 compatible signal levels to the UART logic levels.

From the figure above show the circuit RS 232. RS 232 should have the MAX 232 to convert the signal from RS 232 serial port to signal suitable for use in TTL compatible digital logic circuits. The MAX 232 is a dual driver/receiver and typically converts the Rx, Tx, CTS and RTS signal. The driver provide RS 232 voltage level outputs (approx +- 7.5 V) from a single +5V supply via on chip charge pumps abd external capacitors. This makes it useful for implementing RS 232 in device otherwise do not need any voltage outside the 0V to 5V range, as power supply design does not need to be made more complicated just for driving the RS 232 in this case.

Conclusion:
As a conclusion the circuit will construct to my project.