Application Note
15 of 38
001-86233 Rev. *I
2021-11-04
PSoC™ 4 MCU low
-power modes and power reduction techniques
Power reduction techniques
5.6
Use DMA to move data
You can save power any time you offload a task from the CPU and either halt the CPU or let it do something else
in parallel. The DMA engine can be used in both active and sleep modes to transfer data with no CPU use. The
power saved is either the difference between CPU active and CPU stop power modes if the CPU can be halted,
or lower CPU active current if the CPU can be clocked at a slower frequency and still get the same work done.
The following devices support DMA: 4000DS, 4100 BLE, 4100M, 4100PS, 4100S plus, 4100S max, 4200 BLE,
4200DS, 4200L, 4200M, 4100S pus 256k, 4500S, and analog coprocessor.
