C1.3 Effects of resets on debug registers

Some of the processor reset signals affect the debug registers.

nCPUPORESET

Cold reset that covers reset of the processor logic and the integrated debug functionality.

The signal initializes the processor logic, including the debug, Embedded Trace Macrocell (ETM) trace unit, breakpoint, watchpoint logic, and performance monitors logic.

nCORERESET

Warm reset that covers reset of the processor logic.

The signal resets some of the debug and performance monitor logic.

nPRESETDBG

External debug reset that covers the resetting of the external debug interface and has no impact on the processor functionality.

The signal initializes the shared debug APB, Cross Trigger Interface (CTI), and Cross Trigger Matrix (CTM) logic.

Non-ConfidentialPDF file icon PDF versionARM 100241_0001_00_en
Copyright © 2016, 2017 ARM Limited or its affiliates. All rights reserved.