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ECE 3130 – Digital Electronics and Design

ECE 3130 – Digital Electronics and Design. Lab 7 Binary Counter Fall 2012. Introduction. A binary counter is a device that stores the number of times that an event/process occurs Up/down counter When the selector is in the up state, the counter increments its value

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ECE 3130 – Digital Electronics and Design

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  1. ECE 3130 – Digital Electronics and Design Lab 7 Binary Counter Fall 2012 Allan Guan

  2. Introduction • A binary counter is a device that stores the number of times that an event/process occurs • Up/down counter • When the selector is in the up state, the counter increments its value • When the selector is in the down state, the counter decrements its value Allan Guan

  3. JK Flip-Flops • A universal flip-flop – can be configured as a SRFF, DFF, or TFF • Identical to an SR flip-flop except that S=R=1 is no longer undefined, but rather “toggle/flip” Allan Guan

  4. Master-Slave JKFF Implementation Allan Guan

  5. Up/down counter using T Flip-Flops Circuit Symbol Truth Table Tie the J and K inputs of the JKFF to make a TFF. Allan Guan

  6. 4-bit Up/Down Binary Counter Allan Guan

  7. Analysis • What are some applications of counters? Allan Guan

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