SLAU367P October 2012 – April 2020 MSP430FR5041 , MSP430FR5043 , MSP430FR50431 , MSP430FR5847 , MSP430FR58471 , MSP430FR5848 , MSP430FR5849 , MSP430FR5857 , MSP430FR5858 , MSP430FR5859 , MSP430FR5867 , MSP430FR58671 , MSP430FR5868 , MSP430FR5869 , MSP430FR5870 , MSP430FR5872 , MSP430FR58721 , MSP430FR5887 , MSP430FR5888 , MSP430FR5889 , MSP430FR58891 , MSP430FR5922 , MSP430FR59221 , MSP430FR5947 , MSP430FR59471 , MSP430FR5948 , MSP430FR5949 , MSP430FR5957 , MSP430FR5958 , MSP430FR5959 , MSP430FR5962 , MSP430FR5964 , MSP430FR5967 , MSP430FR5968 , MSP430FR5969 , MSP430FR5969-SP , MSP430FR59691 , MSP430FR5970 , MSP430FR5972 , MSP430FR59721 , MSP430FR5986 , MSP430FR5987 , MSP430FR5988 , MSP430FR5989 , MSP430FR5989-EP , MSP430FR59891 , MSP430FR5992 , MSP430FR5994 , MSP430FR59941 , MSP430FR6005 , MSP430FR6007 , MSP430FR6035 , MSP430FR6037 , MSP430FR60371 , MSP430FR6041 , MSP430FR6043 , MSP430FR60431 , MSP430FR6045 , MSP430FR6047 , MSP430FR60471 , MSP430FR6820 , MSP430FR6822 , MSP430FR68221 , MSP430FR6870 , MSP430FR6872 , MSP430FR68721 , MSP430FR6877 , MSP430FR6879 , MSP430FR68791 , MSP430FR6887 , MSP430FR6888 , MSP430FR6889 , MSP430FR68891 , MSP430FR6920 , MSP430FR6922 , MSP430FR69221 , MSP430FR6927 , MSP430FR69271 , MSP430FR6928 , MSP430FR6970 , MSP430FR6972 , MSP430FR69721 , MSP430FR6977 , MSP430FR6979 , MSP430FR69791 , MSP430FR6987 , MSP430FR6988 , MSP430FR6989 , MSP430FR69891
For a given BRCLK clock source, the baud rate used determines the required division factor N:
N = fBRCLK/baud rate
The division factor N is often a noninteger value, thus, at least one divider and one modulator stage is used to meet the factor as closely as possible.
If N is equal or greater than 16, TI recommends using the oversampling baud-rate generation mode by setting UCOS16.
NOTE
Baud-rate settings quick set up
To calculate the correct the correct settings for the baud-rate generation, perform these steps:
Table 30-4 can be used as a lookup table for finding the correct UCBRSx modulation pattern for the corresponding fractional part of N. The values there are optimized for transmitting.
Fractional Portion of N | UCBRSx(1) | Fractional Portion of N | UCBRSx(1) | |
---|---|---|---|---|
0.0000 | 0x00 | 0.5002 | 0xAA | |
0.0529 | 0x01 | 0.5715 | 0x6B | |
0.0715 | 0x02 | 0.6003 | 0xAD | |
0.0835 | 0x04 | 0.6254 | 0xB5 | |
0.1001 | 0x08 | 0.6432 | 0xB6 | |
0.1252 | 0x10 | 0.6667 | 0xD6 | |
0.1430 | 0x20 | 0.7001 | 0xB7 | |
0.1670 | 0x11 | 0.7147 | 0xBB | |
0.2147 | 0x21 | 0.7503 | 0xDD | |
0.2224 | 0x22 | 0.7861 | 0xED | |
0.2503 | 0x44 | 0.8004 | 0xEE | |
0.3000 | 0x25 | 0.8333 | 0xBF | |
0.3335 | 0x49 | 0.8464 | 0xDF | |
0.3575 | 0x4A | 0.8572 | 0xEF | |
0.3753 | 0x52 | 0.8751 | 0xF7 | |
0.4003 | 0x92 | 0.9004 | 0xFB | |
0.4286 | 0x53 | 0.9170 | 0xFD | |
0.4378 | 0x55 | 0.9288 | 0xFE |