What is a 4-bit synchronous binary counter?

What is a 4-bit synchronous binary counter?

The SN74HC163 is a 4-bit binary counter. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change coincident with each other when instructed by the count-enable (ENP, ENT) inputs and internal gating.

How does a synchronous counter work?

Synchronous Counters use edge-triggered flip-flops that change states on either the “positive-edge” (rising edge) or the “negative-edge” (falling edge) of the clock pulse on the control input resulting in one single count when the clock input changes state.

What is BCD synchronous counter?

A binary coded decimal (BCD) is a serial digital counter that counts ten digits . And it resets for every new clock input. As it can go through 10 unique combinations of output, it is also called as “Decade counter”.

What is 4-bit counter?

The 4-bit counter starts incrementing from 4’b0000 to 4’h1111 and then rolls over back to 4’b0000. It will keep counting as long as it is provided with a running clock and reset is held high. The rollover happens when the most significant bit of the final addition gets discarded.

What is 4-bit up down counter?

Normally the counter increments the 4 bit word (Q4,Q3,Q2,Q1) by one every time the clock input is toggled. If the UP/DOWN input is asserted the counter counts down (subtracts one) upon each clock cycle instead.

What is a 4-bit down counter?

In a binary or BCD down counter, the count decreases by one for each external clock pulse from some preset value. Special dual purpose IC’s such as the TTL 74LS193 or CMOS CD4510 are 4-bit binary Up or Down counters which have an additional input pin to select either the up or down count mode.

How many flip-flops are needed for a 4-bit counter?

4 Flip Flops
This means that to design a 4-bit counter we need 4 Flip Flops. The counter also has a reset pin that enables it to enter an all-zero state i.e. the output of the counter is ‘0’ if the reset is ‘1’ irrespective of the clock and the current state of the flip flops.

What is a 4-bit ripple counter?

4-Bit Ripple Counter. This circuit is a 4-bit binary ripple counter. All the JK flip-flops are configured to toggle their state on a downward transition of their clock input, and the output of each flip-flop is fed into the next flip-flop’s clock.

What is a 4-bit BCD counter?

This is a simple counter circuit where it counts from 0 – 9. It is a 4-bit BCD counter, which consists of 4 output ports those are Qa, Qb, Qc, and Qd. When the circuit’s count reaches ‘1010’, then the device resets itself to ‘0’. This happens for every pulse and the other pulse starts at the 9 th pin.

What is a 4-bit synchronous down counter?

A 4-bit Synchronous down counter start to count from 15 (1111 in binary) and decrement or count downwards to 0 or 0000 and after that it will start a new counting cycle by getting reset. In synchronous down counter, the AND Gate input is changed. First Flip-flop FFA input is same as we used in previous Synchronous up counter.

How does the synchronous counter count sequentially?

On each clock pulse, Synchronous counter counts sequentially. The counting output across four output pin is incremental from 0 to 15, in binary 0000 to 1111 for 4-bit Synchronous up counter. After the 15 or 1111, the counter reset to 0 or 0000 and count once again with a new counting cycle.

What is 4 bit down counter in flip flop?

4 bit Synchronous DOWN Counter Down counter counts the numbers in decreasing order. This is similar to an up counter but is should decrease its count. So inputs of JK flip- flop are connected to the inverted Q (Q’).The 4 bit down counter shown in below diagram is designed by using JK flip flop.