OM13013,598 NXP Semiconductors, OM13013,598 Datasheet - Page 330
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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UM10441
User manual
21.6.3 Channel control base pointer register
21.6.4 Channel alternate control base pointer register
21.6.5 Channel wait on request status register
21.6.6 Channel software request register
This register is a read/write register and configures the base pointer. The base pointer
must point to a location in the LPC122x’s SRAM because the micro DMA controller
provides no internal memory for storing the channel control data structure.
The register cannot be read when the micro DMA controller is in the reset state.
Table 323. Channel control base pointer register (CTRL_BASE_PTR, address 0x4004 C008)
This register is a read-only register and returns the base address of the alternate data
structure.
This register removes the necessity for application software to calculate the base address
of the alternate data structure (see
The register cannot be read when the micro DMA controller is in the reset state.
Table 324. Channel alternate control base pointer register (ATL_CTRL_BASE_PTR, address
This register is a read-only register and returns the status of the dma_waitonreq[c] signal
for a channel c (c = 0 to 20).
The register cannot be read when the micro DMA controller is in the reset state.
Table 325. Channel wait on request status register (DMA_WAITONREQ_STATUS, address
This is a write-only register and enables the generation of a software DMA request for a
channel c (c = 0 to 20).
Writing to a bit where a DMA channel is not implemented does not create a DMA request
for that channel.
Bit
7:0
31:8
Bit
31:0
Bit
20:0
31:21
Symbol
ALT_CTRL_BASE_PTR
Symbol
DMA_WAITONREQ_
STATUS
-
Symbol
-
CTRL_BASE_PTR
bit description
0x4004 C00C) bit description
0x4004 C010) bit description
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 15 February 2011
Chapter 21: LPC122x General purpose micro DMA controller
Description
Reserved. Write as zero.
Pointer to the base address of the primary data structure. 0x0
Description
Channel c wait-on-request status (c = 0 to 20):
Bit c = 0: dma_waitonreq[c] is LOW.
Bit c = 1: dma_waitonreq[c] is HIGH.
Reserved.
Description
Base address of the alternate data structure
Section
21.7.5).
UM10441
© NXP B.V. 2011. All rights reserved.
Reset value
-
-
330 of 442
Reset
value
0x0
Reset
value
0x0
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