NXP Semiconductors MPC5566, Reference Manual

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Deserial Serial Peripheral Interface (DSPI)
MPC5566 Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor 20-17
16–19
CSSCK
[0:3]
PCS x to SCK x delay scaler. Selects the scaler value for the PCS x to SCK x delay. Use in master mode only. The
PCS x to SCK x delay is the delay between the assertion of PCS x and the first edge of the SCK x . The following table
lists the scaler values.
The PCS x to SCK x delay is a multiple of the system clock period. It is computed using the following equation:
Note: See Section 20.4.6.2, “PCS to SCK Delay (tCSC) ,” for more details.
20-23
ASC[0:3]
After SCK x delay scaler. Selects the scaler value for the After SCK x delay. Use in master mode only. The after SCK x
delay is the delay between the last edge of SCK x and the negation of PCS x . The following table lists the scaler
values.
The after SCK x delay is a multiple of the system clock period, and it is computed using the following equation:
Note: See Section 20.4.6.3, “After SCK Delay (tASC) ,” for more details.
Table 20-5. DSPI x _CTAR n Field Description (continued)
Field Description
CSSCK
Value
PCS to SCK Delay
Scaler Value
CSSCK
Value
PCS to SCK Delay
Scaler Value
0000 2 1000 512
0001 4 1001 1024
0010 8 1010 2048
0011 16 1011 4096
0100 32 1100 8192
0101 64 1101 16384
0110 128 1110 32768
0111 256 1111 65536
t
CSC
1
f
SYS
-----------
PCSSCK prescaler value CSSCK scaler value
× ×
=
ASC
Value
After SCK Delay
Scaler Value
ASC
Value
After SCK Delay
Scaler Value
0000 2 1000 512
0001 4 1001 1024
0010 8 1010 2048
0011 16 1011 4096
0100 32 1100 8192
0101 64 1101 16384
0110 128 1110 32768
0111 256 1111 65536
t
ASC
1
f
SYS
-----------
PASC Prescaler value ASC Scaler value
× ×
=