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SERIAL CONTROL MODULE: UART
Wrapper Configuration register
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Wrapper Configuration register
Address: 9001_1000 / 9001_9000 / 9002_1000 / 9002_9000
This is the primary Wrapper Configuration register.
Register
Register bit
assignment
9001_1114 UART Line Status
9001_1118 UART Modem Status
9001_111C UART Scratch
Address Register
13121110987654321015 14
31 29 28 27 26 25 24 23 22 21 20 19 18 17 1630
TXFLOW
Reserv
ed
RXCL
OSE
RXBYTES
RL RS485OFF RS485ON
DTREN
RXFL
USH
RXEN TXEN MODE Reserved RTSEN
TXFL
USH
Reserv
ed
RTS
Bits Access Mnemonic Reset Description
D31 N/A Reserved N/A N/A
D30 R/W RXEN 0 0 Disable wrapper function
1 Enable wrapper to process receive characters
D29 R/W TXEN 0 0 Disable transmitter function
1 Enable wrapper to process transmit characters
D28 R/W MODE 0 Selects either UART or HDLC mode. This bit applies
only to UART3.
0 UART mode
1 HDLC mode
D27:20 N/A Reserved N/A N/A
D19 R/W RTSEN 0 Indicates which signal is output: RTS or RS485
transceiver control.
0RTS
1 RS485 transceiver control
D18 R/W DTREN 0 Indicates which signal is output: DTR or TX baud clock.
0DTR
1 TX baud clock