The maximum clock frequency for the SC16C554DBIA68,529 is 68 MHz.
To configure the UART for 9-bit data transmission, set the MCR[7] bit to '1' and the LCR[0] bit to '1'. This enables 9-bit data transmission with a 9th bit as a parity bit.
The XTAL1 and XTAL2 pins are used to connect an external crystal oscillator, which provides the clock signal for the UART. These pins can also be used as an external clock input.
The SC16C554DBIA68,529 can be reset by asserting the nRESET pin low for at least 10 ns. This resets the UART to its default state.
The SC16C554DBIA68,529 supports baud rates up to 3.125 Mbps.
SC16C554DBIA68,529 datasheet
by NXP Semiconductors
