
ML62Q1000 Series User's Manual
Chapter 14
DMA
Controller
FEUL62Q1000
14-13
14.3 Description of Operation
The DMA controller can be used to transfer data between SFRs (special function registers) of peripheral circuits and data
memory (RAM) without involving the CPU.
After selecting the transfer unit, transfer count, transfer addressing, and transfer trigger followed by enabling the DMA
transfer, once the specified transfer count is completed, the DMA controller interrupt request is generated.
14.3.1 Procedure to Use DMA Controller
The following chart shows the DMA controller setting procedure.
Figure 14-3 DMA Setting Procedure
n=0 or 1
Start
Set with the DCnTN register
Once to 1024 times
Set with DCnSAMD0 and DCnSAMD1 bits of the DCnMOD
register
Select the address fixed mode, increment addressing mode,
or decrement addressing mode
Set with the DCnSA register
Initialize the peripheral used as the trigger
Set the DMA transfer trigger with DCnTRG0 to DCnTRG4 of the
DCnMOD register
Set with the DCnDA register
Set with the DCnDS bit of the DCnMOD register
8-bit or 16-bit
Set with the DCF bit of the DCEN register
Channel free or channel fixed
Set with the DCnEN bit of the DCEN register
(DCnEN=1)
DMA trigger generated -> DMA transfer completed -> DMA
interrupt request wait
Enable the DMA
interrupt
Set with the EDMA bit (EDMA="1")
Transfer count
setting
Transfer unit
setting
Transfer destination
address setting
Addressing mode
setting
Setting for channel
status during
transmission
Transfer source
address setting
Trigger setting
Transmit enable
setting
Other processing
Содержание ML62Q1000 Series
Страница 17: ...Chapter 1 Overview...
Страница 112: ...Chapter 2 CPU and Memory Space...
Страница 154: ...Chapter 3 Reset Function...
Страница 166: ...Chapter 4 Power Management...
Страница 196: ...Chapter 5 Interrupts...
Страница 248: ...Chapter 6 Clock generation Circuit...
Страница 274: ...Chapter 7 Low Speed Time Base Counter...
Страница 291: ...Chapter 8 16 Bit Timer...
Страница 320: ...Chapter 9 Functional Timer FTM...
Страница 382: ...Chapter 10 Watchdog Timer...
Страница 402: ...Chapter 11 Serial Communication Unit...
Страница 456: ...Chapter 12 I2 C Bus Unit...
Страница 491: ...Chapter 13 I2 C Master...
Страница 512: ...Chapter 14 DMA Controller...
Страница 531: ...Chapter 15 Buzzer...
Страница 550: ...Chapter 16 Simplified RTC...
Страница 559: ...Chapter 17 GPIO...
Страница 594: ...Chapter 18 External Interrupt Function...
Страница 612: ...Chapter 19 CRC Generator...
Страница 632: ...Chapter 20 Analog Comparator...
Страница 644: ...Chapter 21 D A Converter...
Страница 655: ...Chapter 22 Voltage Level Supervisor...
Страница 676: ...Chapter 23 Successive Approximation Type A D Converter...
Страница 709: ...Chapter 24 Regulator...
Страница 714: ...Chapter 25 Flash Memory...
Страница 743: ...Chapter 26 Code Option...
Страница 750: ...Chapter 27 LCD Driver...
Страница 788: ...Chapter 28 On Chip Debug Function...
Страница 795: ...Chapter 29 Safety Function...
Страница 813: ...Appendix A...
Страница 881: ...Revision History...