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31:8 00 0000h Reserved
7:6 00
2
FIFO Mode Enable Status (FIFOES[1:0]):
00 = Non-FIFO mode is selected
01 = Reserved
10 = Reserved
11 = FIFO mode is selected (TRFIFOE = 1)
50
2
Reserved
40
2
Autobaud Lock (ABL)
0 = Autobaud circuitry has not programmed Divisor Latch registers (DLL/DLH)
1 = Divisor Latch registers (DLL/DLH) programmed by autobaud circuitry
30
2
Time Out Detected (TOD):
0 = No time out interrupt is pending
1 = Time out interrupt is pending. (FIFO mode only)
2:1 0
2
Interrupt Source Encoded (IID[1:0]): indicates a Modem Status Interrupt when the
IP# bit is low. When IP# bit is high, there is no Interrupt.
00 = Modem Status (CTS, DSR, RI, DCD modem signals changed state)
01 = Transmit FIFO requests data
10 = Received Data Available
11 = Receive error (Overrun, parity, framing, break, FIFO error)
01
2
Interrupt Pending (IP#):
0 = Interrupt is pending. (Active low)
1 = No interrupt is pending