Application Overview

AN4515

10/24

DocID026482 Rev 1

Using events to wakeup CPU

The method uses events instead of interrupts to wake up the CPU from Sleep mode (see

Figure 5).

Figure 5. Using events to wake up the CPU

Summary of BAM implementation methods

Table 2. Summary of methods

Approach

Strength

Weakness

Executing ISRs from RAM

No latency in interrupt

execution

FW little bit complex to

implement

Executing ISRs from Flash

memory

Easy firmware implementation

Latency in interrupt execution

Using events to wake up the

CPU

Interrupts are not executed since

the Flash memory is stopped