Uxbr0, usart baud rate control register 0, Uxbr1, usart baud rate control register 1, Uxmctl, usart modulation control register – Texas Instruments MSP430x4xx User Manual
Page 303
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USART Registers: SPI Mode
15-17
USART Peripheral Interface, SPI Mode
UxBR0, USART Baud Rate Control Register 0
7
6
5
4
3
2
1
0
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
rw
rw
rw
rw
rw
rw
rw
rw
UxBR1, USART Baud Rate Control Register 1
7
6
5
4
3
2
1
0
2
15
2
14
2
13
2
12
2
11
2
10
2
9
2
8
rw
rw
rw
rw
rw
rw
rw
rw
UxBRx
The baud-rate generator uses the content of {UxBR1+UxBR0} to set the
baud rate. Unpredictable SPI operation occurs if UxBR < 2.
UxMCTL, USART Modulation Control Register
7
6
5
4
3
2
1
0
m7
m6
m5
m4
m3
m2
m1
m0
rw
rw
rw
rw
rw
rw
rw
rw
UxMCTLx
Bits
7−0
The modulation control register is not used for SPI mode and should be set
to 000h.
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