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M54HC593 Datasheet(PDF) 2 Page - STMicroelectronics |
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M54HC593 Datasheet(HTML) 2 Page - STMicroelectronics |
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2 / 12 page ![]() INPUT AND OUTPUT EQUIVALENT CIRCUIT TRUTH TABLE INPUTS FUNCTION G G CCLR CCKEN CCKEN CCK CLOAD RCKEN RCK L H X X X X X X X ALL Q BUS BECOME HIGH Z AND CAN BE APPLIED ANY DATA H X X X X X X X X THE OUTPUT DATA OF THE COUNTER IS ENABLE ON QA THRU QH XL X X X X X X X X X L X X X H X X COUNTER IS CLEARED TO ZERO X X H X X X L X X THE DATA OF Q BUS IS LOADED INTO COUNTER X X H H X H X X COUNTER ADVANCES THE COUNT XX H X L H X X X X H H X H X X NO COUNT XX H X L H X X X X H L H X H X X NO COUNT X X X X X X X H X REGISTER DATA IS NOT CHANGED X X X X X X X L REGISTER DATA IS NOT CHANGED X X X X X X X L THE DATA OF Q BUS IS STORED INTO REGISTER X: Don’t Care RCO = QA’ • QB’ • QC’ • QD’ • QE’ • QF’ • QG’ • QH’ (QA’ to QH’: Internal outputs of the counter) M54/M74HC593 2/12 |
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