Typical baud rates and errors – Texas Instruments MSP430x4xx User Manual
Page 273
USART Operation: UART Mode
14-16
USART Peripheral Interface, UART Mode
Typical Baud Rates and Errors
Standard baud rate frequency data for UxBRx and UxMCTL are listed in
Table 14−2 for a 32,768-Hz watch crystal (ACLK) and a typical 1,048,576-Hz
SMCLK.
The receive error is the accumulated time versus the ideal scanning time in the
middle of each bit. The transmit error is the accumulated timing error versus
the ideal time of the bit period.
Table 14−2.Commonly Used Baud Rates, Baud Rate Data, and Errors
Divide by
A: BRCLK = 32,768 Hz
B: BRCLK = 1,048,576 Hz
Baud
Rate
A:
B:
UxBR1
UxBR0
UxMCTL
Max.
TX
Error %
Max.
RX
Error %
Synchr.
RX
Error %
UxBR1
UxBR0
UxMCTL
Max.
TX
Error %
Max.
RX
Error %
1200
27.31
873.81
0
1B
03
−4/3
− 4/3
±
2
03
69
FF
0/0.3
±
2
2400
13.65
436.91
0
0D
6B
− 6/3
− 6/3
±
4
01
B4
FF
0/0.3
±
2
4800
6.83
218.45
0
06
6F
− 9/11
− 9/11
±
7
0
DA
55
0/0.4
±
2
9600
3.41
109.23
0
03
4A
− 21/12
− 21/12
±
15
0
6D
03
−0.4/1
±
2
19,200
54.61
0
36
6B
−0.2/2
±
2
38,400
27.31
0
1B
03
− 4/3
±
2
76,800
13.65
0
0D
6B
− 6/3
±
4
115,200
9.1
0
09
08
− 5/7
±
7