Deserial Serial Peripheral Interface (DSPI)
MPC5565 Microcontroller Reference Manual, Rev. 1.0
Freescale Semiconductor
19-17
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:
Refer to
Section 19.4.6.2, “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:
Refer to
Section 19.4.6.3, “After SCK Delay (tASC)
,” for more details.
Table 19-5. DSPI
x
_CTAR
n
Field Description (continued)
Field
Description
CSSCK
PCS to SCK Delay
Scaler Value
CSSCK
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
After SCK Delay
Scaler Value
ASC
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
×
×
=
Содержание MPC5565
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