Texas Instruments MSP430x4xx - Manual (Page 279)

USART Registers: UART Mode
14-22 USART Peripheral Interface, UART Mode
UxCTL, USART Control Register
7 6 5 4 3 2 1 0
PENA PEV SPB CHAR LISTEN SYNC MM SWRST
rw−0 rw−0 rw−0 rw−0 rw−0 rw−0 rw−0 rw−1
PENA Bit 7 Parity enable
0
Parity disabled.
1 Parity enabled. Parity bit is generated (UTXDx) and expected
(URXDx). In address-bit multiprocessor mode, the address bit is
included in the parity calculation.
PEV Bit 6 Parity select. PEV is not used when parity is disabled.
0
Odd parity
1 Even parity
SPB Bit 5 Stop bit select. Number of stop bits transmitted. The receiver always
checks for one stop bit.
0
One stop bit
1 Two stop bits
CHAR Bit 4 Character length. Selects 7-bit or 8-bit character length.
0
7-bit data
1 8-bit data
LISTEN Bit 3 Listen enable. The LISTEN bit selects loopback mode.
0
Disabled
1 Enabled. UTXDx is internally fed back to the receiver.
SYNC Bit 2 Synchronous mode enable
0
UART mode
1 SPI Mode
MM Bit 1 Multiprocessor mode select
0
Idle-line multiprocessor protocol
1 Address-bit multiprocessor protocol
SWRST Bit 0 Software reset enable
0
Disabled. USART reset released for operation
1 Enabled. USART logic held in reset state