Texas Instruments MSP430x4xx - Manual (Page 286)

USART Registers: UART Mode
14-29 USART Peripheral Interface, UART Mode
IFG1, Interrupt Flag Register 1
7 6 5 4 3 2 1 0
UTXIFG0 URXIFG0
rw−1 rw−0
UTXIFG0 † Bit 7 USART0 transmit interrupt flag. UTXIFG0 is set when U0TXBUF is empty.
0
No interrupt pending
1 Interrupt pending
URXIFG0 † Bit 6 USART0 receive interrupt flag. URXIFG0 is set when U0RXBUF has received
a complete character.
0
No interrupt pending
1 Interrupt pending
Bits
5-0 These bits may be used by other modules. See device-specific datasheet.
IFG2, Interrupt Flag Register 2
7 6 5 4 3 2 1 0
UTXIFG1 URXIFG1
rw−1 rw−0
Bits
7-6 These bits may be used by other modules. See device-specific datasheet.
UTXIFG1 Bit 5 USART1 transmit interrupt flag. UTXIFG1 is set when U1TXBUF empty.
0
No interrupt pending
1 Interrupt pending
URXIFG1 Bit 4 USART1 receive interrupt flag. URXIFG1 is set when U1RXBUF has received
a complete character.
0
No interrupt pending
1 Interrupt pending
Bits
3-0 These bits may be used by other modules. See device-specific datasheet.