![]() Capoacitors-5 and each 1 microFarad are used to generate the necessary RS232 voltage from the TTL/CMOS voltage. The IC MAX232 comprises of a transmitter – receiver arrangement so that two serial ports can be connected using the IC. However, many microcontrollers give a 0 to 5volts o/p and need an intermediate buffer to convert the volts from 0 to 5v to +10 and -10 volts required by the RS232. Some Microcontrollers are built in serial ports which permit for direct connection with the RS232 serial port of the computer. It receives the typical logic values of 0 and 5 volts and alters them to the RS232 standard of +10 and -10v. The block diagram of RS232 interfacing with the microcontroller using MAX232 is shown above.In this, MAX 232 acts as a buffer driver for the processor. RS232 Interfacing to Microcontroller using Max 232 ![]()
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