NXP Semiconductors PXN2020, Reference Manual, Page: 239 / 1376

System Integration Unit (SIU)
PXN20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor 8-57
8.3.2.46 Masked Serial GPO Register for DSPI_A High (SIU_DSPIAH)
The SIU_DSPIAH register allows any combination of bits in the top 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.
Offset: SI 0x0CA4 Access: User write-only
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 PK_MASK[0:10]
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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
W PK[0:10]
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 8-53. Masked Parallel GPIO Pin Data Output Register 9 (SIU_MPGPDO9)
Offset: SI 0x0D00 Access: User read/write
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R MASK
31
MASK
30
MASK
29
MASK
28
MASK
27
MASK
26
MASK
25
MASK
24
MASK
23
MASK
22
MASK
21
MASK
20
MASK
19
MASK
18
MASK
17
MASK
16
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
31
DATA
30
DATA
29
DATA
28
DATA
27
DATA
26
DATA
25
DATA
24
DATA
23
DATA
222
DATA
21
DATA
20
DATA
19
DATA
18
DATA
17
DATA
16
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 8-54. Masked Serial GPO Register for DSPI_A High (SIU_DSPIAH)
Table 8-33. SIU_DSPIAH 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.