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USART Registers: UART Mode
13-22
USART Peripheral Interface, UART Mode
UxCTL, USART Control Register
76543210
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