The MAX3221 is an RS232 transceiver, and these capacitors are required by the operation of charge pump in the device. The voltage generated by the charge pump will supply power for the RS232 side; thus these capacitors must be connected.
The MAX3221 is an RS232 transceiver, and these capacitors are required by the operation of charge pump in the device. The voltage generated by the charge pump will supply power for the RS232 side; thus these capacitors must be connected.