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Define some Applications of Digital Counters?
Digital counters are extremely useful in many applications. They can be effortlessly found in digital clocks and parallel-to-serial data conversion (multiplexing). A group of bits appearing concurrently on parallel lines is called parallel data and a group of bits appearing on a single line in a time sequence is called as serial data.
Parallel-to-serial conversion is usually accomplished by the use of a counter to provide a binary sequence for the data-select inputs of a multiplexer as illustrated in the circuit.
Thus The Q outputs of the modulus-8 counter are connected to the data-select inputs of an eight-bit multiplexer and the first byte (eight-bit group) of parallel data is applied to the multiplexer inputs. As the counter goes throughout a binary sequence from 0 to 7 each bit beginning with D0 is a sequentially selected and passed through the multiplexer to the output line. After the eight clock pulses the data byte has been converted to a serial format and sent out on the transmission line then the counter recycles back to 0 and converts another parallel byte sequentially again by the same process.
STC Set Carry Instruction This instruction sets the carry flag to 1. The instruction format is STC Flags except carry no other flags are affected
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