Regarding to Serial Synchronous port on rabbit 2000

Hi Friends,
I am trying to interface PS2 keyboard to rabbit2000 through serial synchronous port B,I have connected clock out pin of keyboard to CLKB pin of rabbit2000 and data line to RXB pin. The problem is that i am getting wrong data, I am confused whether serial synchronous port accept only 8 bit data string or it accept data with start stop and parity bit.
Can anybody tell me what is the input pattern for the serial synchronous port.