Freescale Semiconductor PXR4030, Reference Manual

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Deserial Serial Peripheral Interface (DSPI)
Freescale Semiconductor 25-15
PXR40 Microcontroller Reference Manual, Rev. 1
10–11
PASC
After SCK Delay Prescaler. The PASC field selects the prescaler value for the delay between the last
edge of SCK and the negation of PCS. This field is only used in Master Mode. The table below lists
the prescaler values. See the ASC[0:3] field description for details on how to compute the After SCK
Delay.
12–13
PDT
Delay after Transfer Prescaler. The PDT field 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. The PDT field is only used in Master Mode. The table below lists the prescaler values. See the
DT[0:3] field description for details on how to compute the Delay after Transfer.
14–15
PBR
Baud Rate Prescal. The PBR field selects the prescaler value for the baud rate. This field is only used
in Master Mode. The Baud Rate is the frequency of the Serial Communications Clock (SCK). The
system clock is divided by the prescaler value before the baud rate selection takes place. The Baud
Rate Prescaler values are listed in the table below. See the BR[0:3] field description for details on how
to compute the baud rate.
Table 25-7. DSPI_CTARn Field Descriptions (continued)
Field Descriptions
PASC After SCK Delay Prescaler Value
00 1
01 3
10 5
11 7
PDT Delay after Transfer Prescaler Value
00 1
01 3
10 5
11 7
PBR Baud Rate Prescaler Value
00 2
01 3
10 5
11 7