The processor provides debug
through registers in the SCS. Refer to the Cortex-M0+ Technical Reference
Manual for details (www.arm.com).
System Timer (SysTick)
The system timer is a 24-bit timer
clocked by CLK_CPU that extends the functionality of both the processor and the
NVIC. Refer to the Cortex-M0+ Technical Reference Manual for details (www.arm.com).
Nested Vectored Interrupt Controller
(NVIC)
External interrupt signals connect
to the NVIC, and the NVIC prioritizes the interrupts. Software can set the
priority of each interrupt. The NVIC and the Cortex-M0+ processor core are closely
coupled, providing low latency interrupt processing and efficient processing of
late arriving interrupts. Refer to the Nested Vector Interrupt Controller
and the Cortex-M0+ Technical Reference Manual for details (www.arm.com).
System Control Block (SCB)
The SCB provides system
implementation information and system control. This includes configuration,
control, and reporting of the system exceptions. Refer to the Cortex-M0+
Devices Generic User Guide for details (www.arm.com).
