Final answer:
The number of different locations depends on the microcontroller architecture. One important location is the Interrupt Enable Register (IER) which contains bits for enabling interrupts for peripherals. The NVIC in the ARM Cortex-M architecture handles interrupt management.
Step-by-step explanation:
The number of different locations required to enable interrupts for a single peripheral depends on the specific microcontroller architecture being used. In general, there are multiple locations involved in enabling interrupts for a peripheral.
One such location is the Interrupt Enable Register (IER), which contains bits that, when set, enable interrupts for specific peripherals. Each peripheral typically has its own bit in the IER.
For example, in the ARM Cortex-M architecture, the NVIC (Nested Vectored Interrupt Controller) handles interrupt management. To enable interrupts for a specific peripheral, you would need to set the corresponding bit in the NVIC's Interrupt Enable Register (ISER).