These detectors change their state when an event occurs and retain in the same state till that event gets cleared. Event DetectorsĪn Event detectors is a circuit which is capable of determining the occurrence of a particular event. Moreover by slightly modifying the connections between the flip-flops, various other kinds of counters can be designed such as, up-counter, down-counter, up/down counter, ring counter, johnson counter, etc. These counters can further be classified as positive or negative edge-triggered depending on the connections provided at their clock inputs.
#EDGE TRIGGERED FLIP FLOP SHIFT REGISTER SERIES#
Similarly to count till 8, one needs to connect 3 (= 2 3) flip-flops in series as shown in Figure 3.įig.3 : 3-bit Asynchronous positive edge triggered up-counterĬounters are broadly classified in to two types based on the clock pulse input,as
#EDGE TRIGGERED FLIP FLOP SHIFT REGISTER MOD#
A single flip-flop has two states 0 and 1, which means that it can count upto two.Thus one flip-flop forms a 2-bit (or Modulo 2, MOD 2) counter. Ī Counter consists of a series of flip-flops (JK or D or T) arranged in a definite manner. CountersĬounter is a digital circuit used for a counting pulses or number of events and it is the widest application of flip-flops. Note : (You can have a detailed study of shift registers here. įig.2 : Different kinds of Shift Registers Further depending on the direction of data movement they can be either left-shift and/or right-shift in nature, as shown by Figureĭepending on the mode of data-shift, there are four mode of operation of a shift register, such as :įurther depending on the direction of data movement they can be either left-shift and/or right-shift in nature. There are various kinds of shift registers viz., serial-in serial-out register, serial-in parallel-out register, parallel-in serial-out register, parallel-in parallel-out register. Such register which allows data transfers is called shift register. The binary data stored in the register can be moved within the register from one flip-flop to another upon the application of clock pulses. This is also called as 3-bit buffer register. 1, the three bits of information ( B 3, B 2 and B 1 ) can be stored in the three D-flip-flops, thus forminf a 3-bit register.