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NuMaker-HMI-MA35D1-S1
Nov. 2, 2022
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Figure 4-9 VoIP Demonstration
4.2.5
Data Security
This demonstration shows how to use a Secure Key (SW key) to restore the protected data, the Secure
Key is encrypted by the key stored in OTP (One-Time Program) in the OP-TEE OS. Figure 4-10 shows
the data flow and structure about this demonstration.
Figure 4-10 Data Security Demonstration
4.2.6
Keyword Spotting by RTP M4
This demonstration describes an example about how to use real-time processor (RTP) Arm Cortex-M4
embedded in the MA35D1 series to wake up the Arm Cortex A35 core in Deep Power-down (DPD)
mode. When A35 core enters DPD mode, the RTP M4 runs the Keyword Spotting code and identifies
the keyword voice input from the microphone on the NuMake-HMI-MA35D1-S1 board. After the keyword
voice is matched, the RTP M4 will generate an interrupt to wake up the A35 core. Figure 4-11 shows
the data flow and structure about the demonstration.