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scs地址空间，NVIC就在这段内

是 ARM Cortex-M 的系统控制寄存器区域的起始地址

不知道，只能跟着学习一下，只当凑热闹

0xE000E000 是 ARM Cortex-M 系列处理器中 NVIC 的内存映射基地址

DEEPSEEK找的

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In the PPB address space, the architecture assigns a 4KB block, 0xE000E000 to 0xE000EFFF, as the System Control Space (SCS). The SCS supports:

• Processor ID registers.

• General control and configuration, including the vector table base address.

• System handler support, for system interrupts and exceptions.

• A system timer, SysTick.

• A Nested Vectored Interrupt Controller (NVIC), that supports up to 496 discrete external interrupts.

• Fault status and control registers.

• The Protected Memory System Architecture, PMSAv7.

• Cache and branch predictor control.

• Processor debug.

See System Control Space (SCS) on page B3-651 for more details

Cortex-M 内核的系统控制寄存器区的起点