How do you turn an up counter into a down counter?

How do you turn an up counter into a down counter?

To convert the up counter in Fig. 5.6. 1 to count DOWN instead, is simply a matter of modifying the connections between the flip-flops. By taking both the output lines and the CK pulse for the next flip-flop in sequence from the Q output as shown in Fig.

How do you make a down counter?

How to design a 2-bit synchronous down counter?

1. Step 1: Find the number of flip-flops and choose the type of flip-flop. Since this is a 2-bit synchronous counter, we have two flip-flops.
2. Step 2: Proceed according to the flip-flop chosen. We will now design the truth table for this counter.

How do you make a flip flop counter?

Problem – Design synchronous counter for sequence: 0 → 1 → 3 → 4 → 5 → 7 → 0, using T flip-flop. T flip-flop – If value of Q changes either from 0 to 1 or from 1 to 0 then input for T flip-flop is 1 else input value is 0. Draw input table of all T flip-flops by using the excitation table of T flip-flop.

How does an up down counter work?

Counters are used in many different applications. Some count up from zero and provide a change in state of output upon reaching a predetermined value; others count down from a preset value to zero to provide an output state change.

How does asynchronous up counter work?

In the asynchronous 4- bit up counter, the flip flops are connected in toggle mode, so when the when the clock input is connected to first flip flop FF0, then its output after one clock pulse will become 20. The rising edge of the Q output of each flip flop triggers the clock input of its next flip flop.

How is a up counter converted to a count down counter?

Converting the synchronous up counter to count down is simply a matter of reversing the count. If all of the ones and zeros in the 0 to 15 10 sequence shown in Table 5.6.2 are complemented, (shown with a pink background) the sequence becomes 15 10 to 0.

How to convert up counter to down counter on flip flops?

As every Q output on the JK flip-flops has its complement on Q, all that is needed to convert the up counter in Fig. 5.6.8 to the down counter shown in Fig 5.6.9 is to take the JK inputs for FF1 from the Q output of FF0 instead of the Q output.

How to design a 2 Bit synchronous down counter?

How to design a 2-bit synchronous down counter? 1 Step 1: Find the number of flip-flops and choose the type of flip-flop. Since this is a 2-bit synchronous counter, we… 2 Step 2: Proceed according to the flip-flop chosen. More

How does the output of a digital counter work?

Counters, consisting of a number of flip-flops, count a stream of pulses applied to the counter’s CK input. The output is a binary value whose value is equal to the number of pulses received at the CK input.

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