LM3S1332 Luminary Micro, Inc, LM3S1332 Datasheet - Page 303
LM3S1332
Manufacturer Part Number
LM3S1332
Description
Lm3s1332 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S1332.pdf
(447 pages)
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Reset
Reset
Type
Type
Read-Only Receive Status (UARTRSR) Register
UART Receive Status/Error Clear (UARTRSR/UARTECR)
UART0 base: 0x4000.C000
UART1 base: 0x4000.D000
Offset 0x004
Type RO, reset 0x0000.0000
July 26, 2008
Bit/Field
31:4
3
2
RO
RO
31
15
0
0
Register 2: UART Receive Status/Error Clear (UARTRSR/UARTECR), offset
0x004
The UARTRSR/UARTECR register is the receive status register/error clear register.
In addition to the UARTDR register, receive status can also be read from the UARTRSR register.
If the status is read from this register, then the status information corresponds to the entry read from
UARTDR prior to reading UARTRSR. The status information for overrun is set immediately when
an overrun condition occurs.
The UARTRSR register cannot be written.
A write of any value to the UARTECR register clears the framing, parity, break, and overrun errors.
All the bits are cleared to 0 on reset.
RO
RO
30
14
0
0
reserved
RO
RO
29
13
0
0
Name
OE
BE
RO
RO
28
12
0
0
RO
RO
27
11
0
0
Type
RO
RO
RO
RO
RO
26
10
0
0
reserved
Reset
RO
RO
25
0
9
0
0
0
0
Preliminary
RO
RO
24
0
8
0
Description
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
UART Overrun Error
When this bit is set to 1, data is received and the FIFO is already full.
This bit is cleared to 0 by a write to UARTECR.
The FIFO contents remain valid since no further data is written when
the FIFO is full, only the contents of the shift register are overwritten.
The CPU must now read the data in order to empty the FIFO.
UART Break Error
This bit is set to 1 when a break condition is detected, indicating that
the received data input was held Low for longer than a full-word
transmission time (defined as start, data, parity, and stop bits).
This bit is cleared to 0 by a write to UARTECR.
In FIFO mode, this error is associated with the character at the top of
the FIFO. When a break occurs, only one 0 character is loaded into the
FIFO. The next character is only enabled after the receive data input
goes to a 1 (marking state) and the next valid start bit is received.
reserved
RO
RO
23
0
7
0
RO
RO
22
0
6
0
RO
RO
21
0
5
0
RO
RO
20
0
4
0
LM3S1332 Microcontroller
RO
OE
RO
19
0
3
0
RO
RO
BE
18
0
2
0
RO
RO
PE
17
0
1
0
RO
RO
FE
16
0
0
0
303
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