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Deserial Serial Peripheral Interface (DSPI)
MPC5566 Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor
20-13
When the DSPI is configured as a SPI master, the CTAS field in the command portion of the TX FIFO
entry selects which of the DSPI
x
_CTAR registers is used on a per-frame basis. When the DSPI is
configured as a SPI bus slave, the DSPI
x
_CTAR0 register is used.
When the DSPI is configured as a DSI master, the DSICTAS field in the DSPI DSI configuration register
(DSPI
x
_DSICR) selects which of the DSPI
x
_CTAR register is used. See
Configuration Register (DSPIx_DSICR)
.” When the DSPI is configured as a DSI bus slave, the
DSPI
x
_CTAR1 register is used.
In CSI configuration, the transfer attributes are selected based on whether the current frame is SPI data or
DSI data. SPI transfers in CSI configuration follow the protocol described for SPI configuration, and DSI
transfers in CSI configuration follow the protocol described for DSI configuration. CSI configuration is
only valid in conjunction with master mode. See
Section 20.4.5, “Combined Serial Interface (CSI)
” for more details.
.
Address:
Base + 0x000C (DSPI
x
_CTAR0)
Base + 0x0010 (DSPI
x
_CTAR1)
Base + 0x0014 (DSPI
x
_CTAR2)
Base + 0x0018 (DSPI
x
_CTAR3)
Base + 0x001C (DSPIx_CTAR4)
Base + 0x0020 (DSPI
x
_CTAR5)
Base + 0x0024 (DSPI
x
_CTAR6)
Base + 0x0028 (DSPI
x
_CTAR7)
Access: R/W
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
DBR
FMSZ
CPOL CPHA
LSB
FE
PCSSCK
PASC
PDT
PBR
W
Reset
0
1
1
1
1
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
CSSCK
ASC
DT
BR
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 20-5. DSPI Clock and Transfer Attributes Registers 0–7 (DSPI
x
_CTAR
n
)
Содержание MPC5566
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