What is WIC in arm?
The Wakeup Interrupt Controller (WIC) is a peripheral that can detect an interrupt and wake the processor from deep sleep mode. When the WIC is enabled and the processor enters deep sleep mode, the power management unit in the system can power down most of the Cortex-M3 processor.
What is the latest ARM Cortex?
Cortex-A53
- Available in Arm Flexible Access.
- The choice for high single thread and FPU/Neon performance.
- Supports a wide range of applications across automotive and networking and more.
- Most widely deployed 64-bit Armv8-A processor.
How does the ARM Cortex-M0 + sleep mode work?
The Arm ® Cortex ® -M0+ core has three Sleep modes to reduce power consumption. The WIC allows an interrupt to be detected even though the clock to the core is disabled. SRPG allows power to be removed from some parts of the core. This helps to reduce the power consumed by transistor leakage.
What are the low power modes of the Cortex M?
In this post, we are going to look at the fundamental low power modes in the Arm Cortex-M processor core and how you can use them. Every microcontroller that is based on the Arm Cortex-M processor will have at least three power modes; Run, Sleep and Deep Sleep.
How does a processor go into sleep mode?
This register has a bit which selects between the ‘Sleep’/’DeepSleep’ modes. The subsystem software will write to this bit to indicate which sleep mode is required, when the processor next enters the sleep mode. The processor enters the sleep mode by executing an instruction called ‘WFE (wait for event) or WFI (wait for Interrupt)’.
How does primask affect wake from sleep behavior?
PRIMASK doesn’t affect wake from sleep behavior. My answer your question about the different between WFI and WFE is based on ARM Cortex-A9 MPcore, please take a look at this link ARM cortex-a9 MPcore TRM. Basically, there are four CPU modes run mode, standby mode, dormant mode, shutdown mode.