The glossary contains terms and acronyms that are used in this document.
Access Port Protection (APPROTECT)
A register used to prevent read and write access to all CPU registers and memory-mapped addresses.
APPROTECT
Control Access Port (CTRL-AP)
A custom access port that enables control of the device even if other access ports in
the debug access port are disabled by the access port protection.
CTRL-AP
Debug Access Port (DAP)
Provides multiple master driving ports, all accessible and controlled through a single
external interface port to provide system-wide debug.
DAP
Device Firmware Update (DFU)
A mechanism for upgrading the firmware of a device.
DFU
Development Kit (DK)
A hardware development platform used for application development.
DK
Erase Protection (ERASEPROTECT)
A register used to block NVMC ERASEALL and CTRL-AP.ERASEALL functionality.
ERASEPROTECT
Factory Information Configuration Registers (FICR)
Pre-programmed registers that contain chip-specific information and configuration.
FICRs cannot be erased by users.
A register used to prevent read and write access to all secure CPU registers and secure memory-mapped addresses.
SECUREAPPROTECT
System on Chip (SoC)
A microchip that integrates all the necessary electronic circuits and components of a
computer or other electronic systems on a single integrated circuit.
SoC
System Protection Unit (SPU)
The central point in the system that controls access to memories, peripherals, and
other resources.
SPU
Serial Wire Debug (SWD)
A standard two-wire interface for programming and debugging Arm® CPUs.
SWD
Serial Wire Debug Port (SW-DP)
An interface that provides a low pin count bi-directional connection to the DAP with a reference clock signal for synchronous operation.
User Information Configuration Registers (UICR)
Non-volatile memory registers used to configure user-specific settings.
UICR
Watchdog timer (WDT)
A timer that causes a system reset if it is not poked periodically.