ARM Architecture - Bus Architecture
Which of the following is the correct syntax to enable the clock for GPIO port A in an ARM microcontroller?
Which of the following is the correct syntax to enable the clock for GPIO port A in an ARM microcontroller?
easy📝 Factual Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Identify the register for enabling GPIOA clock
In ARM microcontrollers, RCC->AHB1ENR controls the clock for GPIO ports; bit 0 corresponds to GPIOA.Step 2: Understand the syntax to enable the clock
Using bitwise OR with (1 << 0) sets bit 0 to 1, enabling the clock for GPIOA.Final Answer:
RCC->AHB1ENR |= (1 << 0); -> Option DQuick Check:
Enable GPIOA clock = RCC->AHB1ENR |= (1 << 0) [OK]
Quick Trick: Use RCC register with bitwise OR to enable clock [OK]
Common Mistakes:
- Using GPIO registers instead of RCC for clock control
- Using bitwise AND to enable instead of OR
- Clearing bits instead of setting them
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