LM3S5G31 Datasheet, PDF (733/1223 Pages) Texas Instruments – Stellaris LM3S5G31 Microcontroller

Stellaris^® LM3S5G31 Microcontroller
Bit/Field
3
2
1
0
Name
SMART
SIRLP
SIREN
UARTEN
Type
R/W
R/W
R/W
R/W
Reset
0
0
0
Description
ISO 7816 Smart Card Support
Value Description
1 The UART operates in Smart Card mode.
0 Normal operation.
The application must ensure that it sets 8-bit word length (WLEN set to
0x3) and even parity (PEN set to 1, EPS set to 1, SPS set to 0) in
UARTLCRH when using ISO 7816 mode.
In this mode, the value of the STP2 bit in UARTLCRH is ignored and
the number of stop bits is forced to 2. Note that the UART does not
support automatic retransmission on parity errors. If a parity error is
detected on transmission, all further transmit operations are aborted
and software must handle retransmission of the affected byte or
message.
UART SIR Low-Power Mode
This bit selects the IrDA encoding mode.
Value Description
1 The UART operates in SIR Low-Power mode. Low-level bits
are transmitted with a pulse width which is 3 times the period
of the IrLPBaud16 input signal, regardless of the selected bit
rate.
0 Low-level bits are transmitted as an active High pulse with a
width of 3/16th of the bit period.
Setting this bit uses less power, but might reduce transmission distances.
See page 725 for more information.
UART SIR Enable
Value Description
1 The IrDA SIR block is enabled, and the UART will transmit and
receive data using SIR protocol.
0 Normal operation.
0
UART Enable
Value Description
1 The UART is enabled.
0 The UART is disabled.
If the UART is disabled in the middle of transmission or reception, it
completes the current character before stopping.
July 03, 2014
733
Texas Instruments-Production Data