Deserial Serial Peripheral Interface (DSPI)
MPC5565 Microcontroller Reference Manual, Rev. 1.0
19-32
Freescale Semiconductor
The following table describes the field in the DSPI deserial serial interface transmit comparison register:
19.3.2.14 DSPI DSI Deserialization Data Register (DSPI
x
_DDR)
The DSPI
x
_DDR holds the signal states for the parallel output signals. The DSPI
x
_DDR is read-only and
it is memory mapped so that host software can read the incoming DSI frames.
The following table describes the field in the DSPI deserialization data register:
19.4
Functional Description
The DSPI supports full-duplex, synchronous serial communications between the MCU and peripheral
devices. The DSPI can also be used to reduce the number of pins required for I/O by serializing and
deserializing up to 16 parallel input/output signals from the eTPU and eMIOS. All communications are
through an SPI-like protocol.
Table 19-15. DSPI
x
_COMPR Field Description
Field
Description
0–15
Reserved.
16–31
COMP_
DATA
[0:15]
Compare data. The COMP_DATA field holds the last serialized DSI data.
Address: Base + 0x00CC
Access: R/O
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
DESER_DATA
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 19-16. DSPI Deserialization Data Register (DSPI
x
_DDR)
Table 19-16. DSPI
x
_DDR Field Description
Field
Description
0–15
Reserved.
16–31
DESER
DATA
Deserialized data. Holds deserialized data which is presented as signal states to the parallel output signals.
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