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UM10503
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© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
489 of 1441
NXP Semiconductors
UM10503
Chapter 20: LPC43xx/LPC43Sxx Serial GPIO (SGPIO)
20.6.8 Position registers
Each position register contains the position counter for one slice: POS0 to POS15 contain
the counter for slice A (register 0) to slice P (register 15).
This register controls when the shadow register REG_SS content is exchanged with main
register REG.
To exchange content every k x 32 bit, POS_PRESET should be 0x20 x k -1. This setting
should be used when k slices are concatenated (CONCAT_ENABLE is set).
Remark:
Before a slice is started (using CTRL_ENABLE), POS should be set to the
POS_PRESET value.
20.6.9 Slice A mask register
20.6.10 Slice H mask register
Table 282. Down counter registers (COUNT[0:15], addresses 0x4010 1180 (COUNT0) to
0x4010 11BC (COUNT15)) bit description
Bit
Symbol
Description
Reset
value
Access
11:0
COUNT
Down counter, counts down each shift clock cycle. Next
count after 0x0 is PRESET.
0
R/W
31:12
-
Reserved.
-
-
Table 283. Position registers (POS[0:15], addresses 0x4010 11C0 (POS0) to 0x4010 11FC
(POS15)) bit description
Bit
Symbol
Description
Reset
value
Access
7:0
POS
Each time COUNT reaches 0x0 POS counts
down.
0
R/W
15:8
POS_RESET
Reload value for POS after POS reaches 0x0.
0
R/W
31:16
-
Reserved.
-
-
Table 284. Slice A mask register (MASK_A, address 0x4010 1200) bit description
Bit
Symbol
Description
Reset
value
Access
31:0
MASK_A
Mask for pattern match function of slice A
0 = No effect.
1 = Mask this bit.
0
R/W
Table 285. Slice H mask register (MASK_H, address 0x4010 1204) bit description
Bit
Symbol
Description
Reset
value
Access
31:0
MASK_H
Mask for pattern match function of slice H
0 = No effect.
1 = Mask this bit.
0
R/W