The maximum clock frequency for the SC16C2550 is 24 MHz.
To configure the SC16C2550 for 9-bit data transmission, set the M1 and M0 bits in the LCR register to '11' and '10' respectively, and set the WLS bit in the LCR register to '1'.
The X2 pin is an external clock input pin that can be used to provide an external clock signal to the device.
To enable the auto-RTS feature on the SC16C2550, set the A RTS bit in the MCR register to '1'.
The maximum baud rate supported by the SC16C2550 is 5 Mbps.
SC16C2550BIB48,128 datasheet
by NXP Semiconductors
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