NXP Semiconductors MPC5566 - Page 942

Deserial Serial Peripheral Interface (DSPI)
MPC5566 Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor 20-17
16–19
CSSCK
[0:3]
PCSx to SCKx delay scaler. Selects the scaler value for the PCSx to SCKx delay. Use in master mode only. The
PCSx to SCKx delay is the delay between the assertion of PCSx and the first edge of the SCKx. The following table
lists the scaler values.
The PCSx to SCKx 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 SCKx delay scaler. Selects the scaler value for the After SCKx delay. Use in master mode only. The after SCKx
delay is the delay between the last edge of SCKx and the negation of PCSx. The following table lists the scaler
values.
The after SCKx 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. DSPIx_CTARn 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××=