We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.
Hello everyone,
I am currently working on a cortex-M0 microprocessor(LPC1114). I have looked through all the possible instruction descriptions but I did not find anyone of them explaining why some instructions takes two cycle to execute.
For example, ANDS, MOVS takes only one cycle to execute. but why do we need two cycles to execute LDR? and STR?
Reading this excellent detailed answer only now ... After my first detailed ARM course.
Joseph Yiu : is there a new /recent book which covers ARM v7 and all cortex'es M and the ARM bus details to the great detail..? I mean not multiple ARM manuals, but a book consolidating it in great detail.
For bus system design, Arm have this book available:
https://www.arm.com/resources/education/books/soc-reference-book
This only cover AHB and APB, but not AXI (too much information for a single book to cover all).
regards,
Joseph