UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
392 of 1269
NXP Semiconductors
UM10503
Chapter 19: LPC43xx General Purpose DMA (GPDMA) controller
19.6.11 DMA Software Last Burst Request Register
The SOFTLBREQ Register is read/write and enables DMA last burst requests to be
generated by software. A DMA request can be generated for each source by writing a 1 to
the corresponding register bit. A register bit is cleared when the transaction has
completed. Reading the register indicates which sources are requesting last burst DMA
transfers. A request can be generated from either a peripheral or the software request
register.
19.6.12 DMA Software Last Single Request Register
The SOFTLSREQ Register is read/write and enables DMA last single requests to be
generated by software. A DMA request can be generated for each source by writing a 1 to
the corresponding register bit. A register bit is cleared when the transaction has
completed. Reading the register indicates which sources are requesting last single DMA
transfers. A request can be generated from either a peripheral or the software request
register.
Table 281. DMA Software Single Request Register (SOFTSREQ, address 0x4000 2024) bit
description
Bit
Symbol
Description
Reset
value
Access
15:0
SOFTSREQ Software single transfer request flags for each of 16
possible sources. Each bit represents one DMA request
line or peripheral function:
0 - writing 0 has no effect.
1 - writing 1 generates a DMA single transfer request for
the corresponding request line.
0x00
R/W
31:16
-
Reserved. Read undefined. Write reserved bits as zero.
-
-
Table 282. DMA Software Last Burst Request Register (SOFTLBREQ, address 0x4000 2028)
bit description
Bit
Symbol
Description
Reset
value
Access
15:0
SOFTLBREQ
Software last burst request flags for each of 16
possible sources. Each bit represents one DMA
request line or peripheral function:
0 - writing 0 has no effect.
1 - writing 1 generates a DMA last burst request for the
corresponding request line.
0x00
R/W
31:16
-
Reserved. Read undefined. Write reserved bits as
zero.
-
-