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Deserial Serial Peripheral Interface (DSPI)
MPC5566 Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor
20-19
20.3.2.4
DSPI Status Register (DSPI
x
_SR)
The DSPI
x
_SR contains status and flag bits. The bits are set by the hardware and reflect the status of the
DSPI and indicate the occurrence of events that can generate interrupt or DMA requests. Software can
clear flag bits in the DSPI
x
_SR by writing a 1 to clear it (w1c). Writing a 0 to a flag bit has no effect.
28–31
BR[0:3]
Baud rate scaler. Selects the scaler value for the baud rate. Use in master mode only. The pre-scaled system clock
is divided by the baud rate scaler to generate the frequency of the SCK. The following table lists the baud rate scaler
values.
The baud rate is computed using the following equation:
Note:
See
Section 20.4.6.1, “Baud Rate Generator
,” for more details.
Address: Base + 0x002C
Access: R/W
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R TCF TXRXS
0
EOQF TFUF
0
TFFF
0
0
0
0
0
RFOF
0
RFDF
0
W w1c
w1c
w1c
w1c
w1c
w1c
Reset
0
0
0
0
0
0
1
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
TXCTR
TXNXTPTR
RXCTR
POPNXTPTR
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 20-6. DSPI Status Register (DSPI
x
_SR)
Table 20-5. DSPI
x
_CTAR
n
Field Description (continued)
Field
Description
BR Value
Baud Rate
Scaler Value
BR Value
Baud Rate
Scaler Value
0000
2
1000
256
0001
4
1001
512
0010
6
1010
1024
0011
8
1011
2048
0100
16
1100
4096
0101
32
1101
8192
0110
64
1110
16384
0111
128
1111
32768
SCK baud rate
f
SYS
PBRPrescalerValue
----------------------------------------------------------
1
DBR
+
BRScalerValue
--------------------------------------------
×
=
Summary of Contents for MPC5566
Page 81: ...Introduction MPC5566 Microcontroller Reference Manual Rev 2 1 24 Freescale Semiconductor...
Page 135: ...Signal Description MPC5566 Microcontroller Reference Manual Rev 2 2 54 Freescale Semiconductor...
Page 189: ...Reset MPC5566 Microcontroller Reference Manual Rev 2 4 20 Freescale Semiconductor...
Page 603: ...Flash Memory MPC5566 Microcontroller Reference Manual Rev 2 13 38 Freescale Semiconductor...
Page 609: ...SRAM MPC5566 Microcontroller Reference Manual Rev 2 14 6 Freescale Semiconductor...
Page 1073: ...MPC5566 Microcontroller Reference Manual Rev 2 22 36 Freescale Semiconductor...
Page 1185: ...Nexus MPC5566 Microcontroller Reference Manual Rev 2 25 92 Freescale Semiconductor...