C1.3.2 Effects of resets on debug registers

The core has the following reset signals that affect the debug registers:

nCPUPORESET
This signal initializes the core logic, including the debug, ETM trace unit, breakpoint, watchpoint logic, and performance monitors logic. This maps to a Cold reset that covers reset of the core logic and the integrated debug functionality.
nCORERESET
This signal resets some of the debug and performance monitor logic. This maps to a Warm reset that covers reset of the core logic.
nPRESETDBG
This signal initializes the shared debug APB, CTI, and CTM logic. This maps to an External Debug reset that covers the resetting of the external debug interface and has no impact on the core functionality.
Non-ConfidentialPDF file icon PDF version100442_0200_00_en
Copyright © 2016–2018 Arm Limited or its affiliates. All rights reserved.