LM3S317 Luminary Micro, Inc, LM3S317 Datasheet - Page 246
![no-image](/images/no-image-200.jpg)
LM3S317
Manufacturer Part Number
LM3S317
Description
Lm3s317 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S317.pdf
(376 pages)
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Universal Asynchronous Receiver/Transmitter (UART)
246
Reset
Reset
Type
Type
Bit/Field
31:10
UART Control (UARTCR)
Offset 0x030
6:1
9
8
7
0
RO
RO
31
15
0
0
Register 7: UART Control (UARTCTL), offset 0x030
The UARTCTL register is the control register. All the bits are cleared on reset except for the
Transmit Enable (TXE) and Receive Enable (RXE) bits, which are set to 1.
To enable the UART module, the UARTEN bit must be set to 1. If software requires a configuration
change in the module, the UARTEN bit must be cleared before the configuration changes are
written. If the UART is disabled during a transmit or receive operation, the current transaction is
completed prior to the UART stopping.
RO
RO
30
14
0
0
UARTEN
reserved
reserved
Name
RXE
TXE
LBE
RO
RO
29
13
0
0
reserved
RO
RO
28
12
0
0
Type
R/W
R/W
R/W
R/W
RO
RO
RO
RO
27
11
0
0
RO
RO
26
10
0
0
Reset
0
1
1
0
0
0
RXE
R/W
RO
25
0
9
1
Preliminary
Description
Reserved bits return an indeterminate value, and should never
be changed.
UART Receive Enable
If this bit is set to 1, the receive section of the UART is enabled.
When the UART is disabled in the middle of a receive, it
completes the current character before stopping.
UART Transmit Enable
If this bit is set to 1, the transmit section of the UART is enabled.
When the UART is disabled in the middle of a transmission, it
completes the current character before stopping.
UART Loop Back Enable
If this bit is set to 1, the UNTX path is fed through the UNRX path.
Reserved bits return an indeterminate value, and should never
be changed.
UART Enable
If this bit is set to 1, the UART is enabled. When the UART is
disabled in the middle of transmission or reception, it completes
the current character before stopping.
TXE
R/W
RO
24
0
8
1
reserved
LBE
R/W
RO
23
0
7
0
RO
RO
22
0
6
0
RO
RO
21
0
5
0
RO
RO
20
0
4
0
reserved
RO
RO
19
0
3
0
RO
RO
18
0
2
0
February 6, 2007
RO
RO
17
0
1
0
UARTEN
R/W
RO
16
0
0
0
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