NXP Semiconductors PXN2020, Reference Manual, Page: 240 / 1376

System Integration Unit (SIU)
PXN20 Microcontroller Reference Manual, Rev. 1
8-58 Freescale Semiconductor
8.3.2.47 Masked Serial GPO Register for DSPI_A Low (SIU_DSPIAL)
The SIU_DSPIAL register allows any combination of bits in the bottom half of the 32-bit serialized data
frame from DSPI_A to be updated with a single 32-bit write operation, while allowing other bits to
maintain their previous state. This is accomplished by writing a 16-bit masked value coherently with an
update value contained in a 16-bit output field, and only updating those bits in the output register for which
the corresponding mask bit is set.
8.3.2.48 Masked Serial GPO Register for DSPI_B High (SIU_DSPIBH)
The SIU_DSPIBH register allows any combination of bits in the top half of the 32-bit serialized data frame
from DSPI_B to be updated with a single 32-bit write operation, while allowing other bits to maintain their
previous state. This is accomplished by writing a 16-bit masked value coherently with an update value
contained in a 16-bit output field, and only updating those bits in the output register for which the
corresponding mask bit is set.
Offset: SI 0x0D04 Access: User read/write
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R MASK
15
MASK
14
MASK
13
MASK
12
MASK
11
MASK
10
MASK
9
MASK
8
MASK
7
MASK
6
MASK
5
MASK
4
MASK
3
MASK
2
MASK
1
MASK
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 DATA
15
DATA
14
DATA
13
DATA
12
DATA
11
DATA
10
DATA
9
DATA
8
DATA
7
DATA
6
DATA
5
DATA
4
DATA
3
DATA
2
DATA
1
DATA
0
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 8-55. Masked Serial GPO Register for DSPI_A Low (SIU_DSPIAL)
Table 8-34. SIU_DSPIAL Field Descriptions
Field Description
MASKn Mask Bit. This bit controls the write access to the corresponding GPO for DSPI_A.
0 The previous value defined by GPO for DSPI_A is maintained.
1 The corresponding GPO for DSPI_A is written with the value defined by the DATAn field.
DATAn Pin Data Out. This bit stores the data to be driven out on the GPO for DSPI_A output controlled by this register.
0 Logic low value is driven for the corresponding GPO for DSPI_A when this output is selected in the DSPI
serialization module.
1 Logic high value is driven for the corresponding GPO for DSPI_A when this output is selected in the DSPI
serialization module.