Texas Instruments MSP430x1xx User Manual page 307

USART Registers: SPI Mode
UxRCTL, USART Receive Control Register
7 6
FE Unused
rw−0 rw−0
FE
Bit 7 Framing error flag. This bit indicates a bus conflict when MM = 1 and STC
= 0. FE is unused in slave mode.
0
1
Undefined Bit 6 Unused
OE Bit 5 Overrun error flag. This bit is set when a character is transferred into
UxRXBUF before the previous character was read. OE is automatically
reset when UxRXBUF is read, when SWRST = 1, or can be reset by
software.
0
1
Unused Bit 4 Unused
Unused Bit 3 Unused
Unused Bit 2 Unused
Unused Bit 1 Unused
Unused Bit 0 Unused
14-16
USART Peripheral Interface, SPI Mode
5 4 3
OE Unused Unused
rw−0 rw−0 rw−0
No conflict detected
A negative edge occurred on STE, indicating bus conflict
No error
Overrun error occurred
2 1
Unused Unused Unused
rw−0 rw−0 rw−0
0