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SN54LS90: SN54LS90

Part Number: SN54LS90

Tool/software:

I need to create a counter that costs up to one min with the ability to pause in between.

The pause will occur either due to a temp threshold being triggered or the individual pressing a pause.

I am not sure how to pause this without loosing the prior count? Also, let's say I use a 100Mhz clock. Is there a way to do the above function without having to divide it to essentially get a 1hz signal with with a decade would get close enough to one min.

Thanks