OM13013,598 NXP Semiconductors, OM13013,598 Datasheet - Page 342
OM13013,598
Manufacturer Part Number
OM13013,598
Description
BOARD DEMO IAR LPC1227 JLINKLITE
Manufacturer
NXP Semiconductors
Series
-r
Specifications of OM13013,598
Design Resources
LPC122x-SK Brd Schematic
Processor To Be Evaluated
LPC1227
Processor Series
LPC122x
Data Bus Width
32 bit
Interface Type
UART, SSP, SPI, I2C
Cpu Core
ARM Cortex-M0
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Operating Supply Voltage
3 V to 3.6 V
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
568-6885
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NXP Semiconductors
UM10441
User manual
21.7.5 DMA control
The controller uses the SRAM to enable it to access two pointers and the control
information that it requires for each channel.The channel control information is contained
in the channel control data structure, and the source and destination addresses for the
DMA transfer are defined by the source end and destination end pointers.
Fig 56. DMA ping-pong cycle
request/arbitrate
request/arbitrate
request/arbitrate
request/arbitrate
request/arbitrate
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 15 February 2011
Chapter 21: LPC122x General purpose micro DMA controller
channel c, cycle 5
channel c, cycle 1
channel c, cycle 3
primary channel
data structure
control
request/arbitrate
request/arbitrate
request/arbitrate
request/arbitrate
request/arbitrate
cycle_ctrl = 011; 2
cycle_ctrl = 011; 2
cycle_ctrl = 011; 2
N = 2
N = 3
alternate channel
R
channel c, cycle 4
channel c, cycle 2
R
data structure
R
= 4, N = 6
= 2, N = 2
invalid cycle
= 4, N = 7
channel c,
control
cycle_ctrl = 011; 2
cycle_ctrl = 000
cycle_ctrl = 011; 2
N = 8
N = 4
N = 1
UM10441
dma_done[c]
dma_done[c]
dma_done[c]
dma_done[c]
dma_done[c]
© NXP B.V. 2011. All rights reserved.
R
R
= 4, N = 5
= 4, N = 12
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