Re: I do not understand the math notation in this chapter.

Posted by cadet1620 on
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/I-do-not-understand-the-math-notation-in-this-chapter-tp4032141p4032164.html

The HardwareSimulator's DFFs are master-slave like the example on play-hookey. See this forum post.

There is another type of DFF that is called edge-triggered, that behaves as you are describing—it ignores the input until the moment the clock falls. The implementation of edge-triggered flip-flops is a bit difficult to understand because they depend on analog properties of the transistors that implement them.

There are also flip-flops that are active on the positive edge.

--Mark