CM335X reference design: RS232 design based on TI AM3358 CM335X core module.
The CM335X is a core module based on the TI’s Sitara AM335X Cortex-A8 processor. The core module is Measured only 67.6mm by 36.5mm, integrates 512MBytes DDR3 SDRAM and up to 8GBytes eMMC flash.
The MAX3222/MAX3232/MAX3237/MAX3241 transceivers have a proprietary low-dropout transmitter output stage enabling true RS-232 performance from a 3.0V to 5.5V supply with a dual charge pump.
【Download schematic】：CM335X_RS232 X 6