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.

Which counters can do up and down counting?

Bidirectional counters, also known as Up/Down counters, are capable of counting in either direction through any given count sequence and they can be reversed at any point within their count sequence by using an additional control input as shown below.

How does a synchronous up counter work?

In synchronous counter, the clock input across all the flip-flops use the same source and create the same clock signal at the same time. So, a counter which is using the same clock signal from the same source at the same time is called Synchronous counter.

What an up-down counter also known as?

Explanation: UP-DOWN counter is also known as multimode counter because it has capability of counting upward as well as downwards. Explanation: In DOWN-counter, each flip-flop is triggered by the inverted output of the preceding flip-flop. DOWN-counter counts from a maximum value to 0.

What is difference between up and down counter?

An up-counter counts events in increasing order. A down-counter counts stuff in the decreasing order. An up-down counter is a combination of an up-counter and a down-counter. It can count in both directions, increasing as well as decreasing.

What is synchronous up-down counter?

Overview: These types of counters fall under the category of synchronous controller counter. Here the mode control input is used to decide whether which sequence will be generated by the counter. In this case, mode control input is used to decide whether the counter will perform up counting or down counting.

What is the difference between up and down counters?

What is 3 bit up counter?

The 3-bit Asynchronous binary up counter contains three T flip-flops and the T-input of all the flip-flops are connected to ‘1’. All these flip-flops are negative edge triggered but the outputs change asynchronously. The output of first T flip-flop is applied as clock signal for second T flip-flop.

What is synchronous up down counter?

What is counter explain synchronous and synchronous counter?

Synchronous counter is the one in which all the flip flops are clocked simultaneously with the similar clock input. On the contrary, an asynchronous counter is a device in which all the flip flops that constitute that counter are clocked with different input signals at different instants of time.

What is the difference between an up-counter and down-counter?

An up-counter counts events in increasing order. A down-counter counts stuff in the decreasing order. An up-down counter is a combination of an up-counter and a down-counter. It can count in both directions, increasing as well as decreasing.

Why are up and Down counters not widely used in circuits?

Although both up and down counters can be built, using the asynchronous method for propagating the clock, they are not widely used as counters as they become unreliable at high clock speeds, or when a large number of flip-flops are connected together to give larger counts, due to the clock ripple effect.

How to convert the up and down counter of a flip-flop?

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. 5.6.3, a positive edge triggered counter will count down from 1111 2 to 0000 2.

How do you count down on a synchronous up 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.