NXP Semiconductors K32 L2A Series, Reference Manual, Page: 147 / 1379

Chapter 8
Security
8.1 Introduction
This device implements security based on the mode selected from the flash module.
The following sections provide an overview of flash security and details the effects of
security on non-flash modules.
The device security provides:
• Security of the flash and MCU via SEC bit
• Backdoor Key and Freescale Backdoor key access support
• Disable access to the debugger via the SWD interface
8.1.1 Debug security
Debug enables access to the Core for debugging, and also for programming the flash
arrays. For the standard Programming mechanism, you make use of the FTFx_SEC
register to enable security. Setting the FTFx_SEC [SEC] bits secures the Core from
debug access.
8.1.2 Flash security
The device has 2 flash modules:
• Flash0 - 256K bytes
• Flash1 - 256K bytes
Both Flash0 and Flash1 are available to the user for application code. The Flash security
follows the structure for other L series devices.
The FTFx module (using FTFx_FSEC register) provides security features:
K32 L2A Reference Manual, Rev. 2, 01/2020
NXP Semiconductors 147