The maximum clock frequency for the SC16C654BIBM,128 is 5 MHz.
To configure the UART for 9-bit data transmission, set the MCR register to enable 9-bit mode, and then set the LCR register to select the 9-bit data length.
The FIFO buffers in the SC16C654BIBM,128 are used to store received data temporarily, allowing the microcontroller to process other tasks while the UART is receiving data.
To handle interrupts generated by the SC16C654BIBM,128, enable the interrupt source in the IER register, and then write an interrupt service routine to handle the interrupt.
The maximum baud rate supported by the SC16C654BIBM,128 is 1.5 Mbps.