NXP Semiconductors LPC55S6 Series, Примечание к применению

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Figure 1. Secure state and Non-secure state view for TrustZone
In summary:
• NS application code “trust” that secure code, does not corrupt/modify NS code or data inadvertently or on purpose to create
malfunction or hazard
• S application code does not “trust” NS application code and disallows access to a CPU-NS
1.1.2 Secure AHB Controller
The LPC55S6x implements second layer of protection with Secure AHB Controller to provide secure trusted execution at system-
level.
With Secure AHB Controller, you can configure security access rules for each peripheral.
By default, CM33 CPU in Secure state (CPU-S) can access the peripherals in both S-state and NS-state. CM33 CPU in Non-
secure state (CPU-NS) can only access the peripherals in NS-state. As shown in
Fig 2 .
NXP Semiconductors
Background
LPC55S6x Secure GPIO and Usage, Rev. 0, 15 January 2019
Application Note
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