4bit binary counter
< Function description >
- File name
- CNT4.nsl
- Function
- 4bit synchronouse counter circuit.
- - Asynchronous reset.
- - Carry input
- - Initial value load
- - Count enable
- - Carry output
- I/O signal
- PARAM_in[4]=Initial value.
- LOAD_in=Load request.
- ENB_in=Count enable.
- CARRY_in=Carry input.
- Q_out[4]=Data output.
- CARRY_out=Carry output.
- Specification
- This code shown example of 4bit clock synchronous counter using 4bit F/F.
- At a ‘LOAD_in’ signal is asserted, ‘PARAM_in’ values are loaded to 4bit counter.
- Also, ‘ENB_in’ and ‘CARRY_in’ are asserted, counter is ‘+1′.
- A ‘CARRY_out()’ function output signal is asserted at 4bit register value’s status is all H(4′b1111′).
- Note
- NSL language style does not need to care a implicit CLOCK and asynchronous reset in source code.
- These signals are automatically generated by NSL synthesis tools.
- At ‘CARRY_in()’ function control signal is asserted, ‘Function [sigName]‘ block will be called.
