The RS232 Click Board™ provides an interface between the TTL/CMOS logic levels commonly used on microcontrollers and the RS-232 bus. RS-232 is a rather old communication protocol that has survived thanks to its robustness and implementation on many personal computer motherboards. It can still be found on various pieces of DTE and DCE equipment. This Click Board™ allows standard type MCUs to communicate through the RS-232 interface via the standard UART bus pins: RX and TX.
The RS232 Click Board™ utilizes the MAX3232, a 3.0V to 5.5V low power, true RS-232 transceiver, from Maxim Integrated. This device can achieve communication speed up to 232 kbps (EIA/TIA-232).