Cmsemicon CMS32L051 - DMA Control Data Areas and DMA Vector Table Areas Allocation

V1.2.2
CMS32L051 User Manual |Chapter 16 Enhanced DMA
www.mcu.com.cn 578 / 703
16.3.1 DMA control data areas and DMA vector table areas allocation
The control data allocated to the DMA and the 416-byte region of the vector table are set to the RAM
area via the DMABAR register.
An example of a memory image with a DMABAR register set to 20000000H is shown in Figure 16-2.
The 384 bytes of DMA control data area in the DMA unused space can be used as RAM.
Figure 16-2 Example of memory image when the DMABAR register is set to 20000000H
reserved
Cortex-M0+
dedicated peripherial
resource region
reserved
peripherial resource region
reserved
SRAM
4KB
reserved
data flash
1.5KB
reserved
main flash region
32KB
FFFF_FFFFH
E00F_FFFFH
E000_0000H
4005_FFFFH
4000_0000H
2000_0FFFH
2000_0000H
0050_05FFH
0050_0000H
0000_7FFFH
0000_0000H
DTC control
data region
384 bytes
Reserved region
8 bytes
DTC vector table region
24 bytes
20000000H
20000018H
20000020H
2000019FH
200001A0H
DMA usage region
416 bytes