RM0046 Deserial Serial Peripheral Interface (DSPI)
Doc ID 16912 Rev 5 451/936
28–31
BR[0:3]
Baud Rate Scaler
The BR field selects the scaler value for the baud rate. This field is only used in Master Mode.
The pre-scaled system clock is divided by the baud rate scaler to generate the frequency of the
SCK. Table 214 lists the baud rate scaler values.
The baud rate is computed according to the following equation:
Equation 20
See Section , “Baud rate generator for more details.
Table 208. DSPIx_CTARn field descriptions (continued)
Field Descriptions
SCK baud rate
f
SYS
PBR
-------------
1DBR+
BR
-----------------------ď‚´=
Table 209. DSPI SCK duty cycle
DBR CPHA PBR SCK duty cycle
0 any any 50/50
1 0 00 50/50
1 0 01 33/66
1 0 10 40/60
1 0 11 43/57
1 1 00 50/50
1 1 01 66/33
1 1 10 60/40
1 1 11 57/43
Table 210. DSPI transfer frame size
FMSZ Frame size FMSZ Frame size
0000 Reserved 1000 9
0001 Reserved 1001 10
0010 Reserved 1010 11
0011 4 1011 12
0100 5 1100 13
0101 6 1101 14
0110 7 1110 15
0111 8 1111 16
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