STMicroelectronics SPC572L series Reference Manual page 1149

RM0400
Field
LSB First.
Specifies whether the LSB or MSB of the frame is transferred first.
7
In TSB mode, this bit should comply with the MSC specification.
LSBFE
0 Data is transferred MSB first.
1 Data is transferred LSB first.
PCS to SCK Delay Prescaler.
Selects the prescaler value for the delay between assertion of PCS and the first edge of the SCK.
See the CSSCK field description in this table for calculating the PCS to SCK Delay.
Refer to
8–9
In TSB mode, PCSSCK has no effect.
PCSSCK
00 PCS to SCK Prescaler value is 1.
01 PCS to SCK Prescaler value is 3.
10 PCS to SCK Prescaler value is 5.
11 PCS to SCK Prescaler value is 7.
After SCK Delay Prescaler.
Selects the prescaler value for the delay between the last edge of SCK and the negation of PCS.
See the ASC field description in this table for calculating the After SCK Delay.
Refer to
10–11
In TSB mode, PASC has no effect.
PASC
00 Delay after Transfer Prescaler value is 1.
01 Delay after Transfer Prescaler value is 3.
10 Delay after Transfer Prescaler value is 5.
11 Delay after Transfer Prescaler value is 7.
Delay after Transfer Prescaler. (Master mode only)
Selects the prescaler value for the delay between the negation of the PCS signal at the end of a
frame and the assertion of PCS at the beginning of the next frame.
In TSB mode, the PDT field defines two MSB bits of the Delay after Transfer.
12–13
See the DT field description for calculating the Delay after Transfer.
PDT
Refer to
00 Delay after Transfer Prescaler value is 1.
01 Delay after Transfer Prescaler value is 3.
10 Delay after Transfer Prescaler value is 5.
11 Delay after Transfer Prescaler value is 7.
Baud Rate Prescaler. (Master mode only)
Selects the prescaler value for the baud rate.
The baud rate is the frequency of the SCK. The protocol clock is divided by the prescaler value
before the baud rate selection takes place.
14–15
See the BR field description in this table for calculating the baud rate.
PBR
00 Baud Rate Prescaler value is 2.
01 Baud Rate Prescaler value is 3.
10 Baud Rate Prescaler value is 5.
11 Baud Rate Prescaler value is 7.
Table 612. DSPI_CTARn field descriptions(Continued)
Section 46.5.5.2: PCS to SCK delay (tCSC)
Section 46.5.5.3: After SCK delay (tASC)
Section 46.5.5.4: Delay after transfer (tDT)
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