What is synchronous up-down counter?
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.
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 do you change counter to 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.
What is 3 bit synchronous up-down counter?
The 3-bit Synchronous binary up counter contains three T flip-flops & one 2-input AND gate. The output of second T flip-flop toggles for every negative edge of clock signal if Q0 is 1. The output of third T flip-flop toggles for every negative edge of clock signal if both Q0 & Q1 are 1.
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 decade counter IC?
A decade counter is one that counts in decimal digits, rather than binary. A decade counter may have each (that is, it may count in binary-coded decimal, as the 7490 integrated circuit did) or other binary encodings. A decade counter is a binary counter that is designed to count to 1001 (decimal 9).
What is the use of up counter?
The UP/DOWN counter can be used as a self-reversing counter. It is also used as clock divider circuit. The parallel load feature can be used to preset the counter for some initial count.
Is up-down counter synchronous?
The counters are synchronous, but they are asynchronously presettable. A simple three-bit Up/Down synchronous counter can be built using JK flip-flops configured to operate as toggle or T-type flip-flops giving a maximum count of zero (000), advancing through 001, 010 to seven (111) and back to zero again.
What is 4-bit binary up-down counter?
A 4-bit binary up/down counter counts sequence from 0000 to 1111 and 1111 to 0000. When the external input UP is equal to 1, no matter what the DOWN input is, the circuit operates as an UP counter and counts sequence from 0000 to 1111.