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SERIAL CONTROL MODULE: UART
UART Modem Status register
412 Hardware Reference NS9215
Register
Register bit
assignment
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UART Modem Status register
Address: 9001_1118 / 9001_9118 / 9002_1118 / 9002_9118
The UART Modem Status register reads the modem status register. This register is
used for diagnostic purposes only.
13121110987654321015 14
31 29 28 27 26 25 24 23 22 21 20 19 18 17 1630
Reserved
Reserved
OEFEBITHRE DRFIER TEMT
PE
Bits Access Mnemonic Reset Description
D31:08 N/A Reserved N/A N/A
D07 R FIER N/A RX FIFO error
Indicates at least one parity, framing, or break error in the
RX FIFO.
D06 R TEMT N/A Transmit holding and shift registers empty
D05 R THRE N/A Transmit holding register empty
D04 R BI N/A Break indicator
The receiver found a line break.
D03 R FE N/A Framing error
The receiver found a framing error.
D02 R PE N/A Parity error
The receiver found a parity error.
D01 R OE N/A Overrun error
The RX FIFO experienced an overrun.
D00 R DR N/A Data ready
Indicates a data byte is ready in the FIFO.