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stm32f3/4 maximum gpio read write operation

Question asked by tag.aseok on Nov 9, 2016
Latest reply on Dec 10, 2016 by S. Marsanne
As i inspected through assembly instructions, it is possible to read 16 bits gpio port with 2 cpu cycles and write with 4 cpu cycles, beside of electrical considerations, is it possible to achieve reading and writing with 1 cpu cycle? what is it's related assembly instruction?