Sequential (42) Set and Preset

https://chihaukam.blogspot.com/2024/10/john-kelvin-24-hours-open-integraed.html

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Ref: https://wodewangzhishime.blogspot.com/2022/03/httpswodewangzhishime_15.html?m=1
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John : See the Picture above.  There's a function called Set and clear. And , this function is independent from clock line. 

Me: That mean I can set it or clear it no matter if the clock line is at Up cycle or not. 

John: Yes, when the Clk line is at Up cycle,  the output line is at up cycle too. Therefore,  the "resistance of output" is too high.  As a result,  the Q can't output their value onto the output line.