![NXP Semiconductors LPC43Sxx Скачать руководство пользователя страница 525](http://html1.mh-extra.com/html/nxp-semiconductors/lpc43sxx/lpc43sxx_user-manual_1721827525.webp)
UM10503
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
525 of 1441
NXP Semiconductors
UM10503
Chapter 21: LPC43xx/LPC43Sxx General Purpose DMA (GPDMA)
20:18
SWIDTH
Source transfer width. Transfers wider than the AHB master bus
width are illegal. The source and destination widths can be
different from each other. The hardware automatically packs
and unpacks the data as required. 0x3 to 0x7 - Reserved.
0x0
R/W
0x0
Byte (8-bit)
0x1
Halfword (16-bit)
0x2
Word (32-bit)
23:21
DWIDTH
Destination transfer width. Transfers wider than the AHB master
bus width are not supported. The source and destination widths
can be different from each other. The hardware automatically
packs and unpacks the data as required. 0x3 to 0x7 - Reserved.
0x0
R/W
0x0
Byte (8-bit)
0x1
Halfword (16-bit)
0x2
Word (32-bit)
24
S
Source AHB master select:
0
R/W
0
AHB Master 0 selected for source transfer.
1
AHB Master 1 selected for source transfer.
25
D
Destination AHB master select:
Remark:
Only Master1 can access a peripheral. Master0 can
only access memory.
0
R/W
0
AHB Master 0 selected for destination transfer.
1
AHB Master 1 selected for destination transfer.
26
SI
Source increment:
0
R/W
0
The source address is not incremented after each transfer.
1
The source address is incremented after each transfer.
27
DI
Destination increment:
0
R/W
0
The destination address is not incremented after each transfer.
1
The destination address is incremented after each transfer.
28
PROT1
This information is provided to the peripheral during a DMA bus
access and indicates that the access is in user mode or
privileged mode.
0
R/W
0
User mode
1
Privileged mode
29
PROT2
This information is provided to the peripheral during a DMA bus
access and indicates to the peripheral that the access is
bufferable or not bufferable.
0
R/W
0
Not bufferable
1
Bufferable
30
PROT3
This information is provided to the peripheral during a DMA bus
access and indicates to the peripheral that the access is
cacheable or not cacheable.
0
R/W
0
Not cacheable
1
Cacheable
Table 350. DMA Channel Control registers (CONTROL[0:7], 0x4000 210C (CONTROL0) to 0x4000 21EC (CONTROL7))
bit description
…continued
Bit
Symbol
Value Description
Reset
value
Access