March 2, 2012

# synchronous and asynchronous

synchronous and asynchronous Both works on their appropriate places but asynchronous design is very complex and filled with dangers for new and for experienced designers as well. Synchronous design is preferred over asynchronous. Asynchronous design often involve multiple level combination circuits, flip-flops and macro functions such as counters and shift registers. These structures don’t help […]

## states does a mod-14 counter have

states does a mod-14 counter have States = 2^n Where n = no of flip flops Here n = 4 So States = 24=16 Mod 14 can calculate 16 states

## flip-flops are required for mod-14 counter flip-flops are required for mod-14 counter Remember with ‘n’ no. of flip-flop you can get upto max. modulo-[2^n] counter. Therefore for modulo-14 counter 2^3 = 8 which is less than 14 and 2^4 = 16 which is greater than 14 Hence we require 4 F/F.

## flip-flops are required to produce a divide-by-32 device

5 flip-flops are required to produce a divide-by-32 device There are 5 flip-flops are required to produce a divide-by-32 device. We can have the no. of required flip-flops by . For 32 we have to do 2^5.

## The main difference between a gated S-R latch and an edge-triggered S-R flip-flop

The main difference between a gated S-R latch and an edge-triggered S-R flip-flop The main difference between a gated S-R latch and an edge-triggered S-R flip-flop is that in gated S-R latch the output is dependent on active-high of enable input but in edge-triggered S-R flip-flop output will be affected by appropriate inputs at S […]