CLOCK - Configurable clock

The CLOCK block contains a user-settable clock with parametable width and period.

Fields

Name	Type	Description
ENABLE	bit_mux	Halt and reset on falling edge, enable on rising
PERIOD	param time	Period of clock output
WIDTH	param time	Width of clock output
OUT	bit_out	Clock output

Setting clock period parameters

Each time a clock width or period parameter is set, the clock restarts from that point with the new width and period value.

(Source code, png, hires.png, pdf)

The clock is disabled when both width and period parameters are set to 0. If period is smaller or egale to width then it’ll be adjusted to (width + 1) and at least to 2. If width=0, then the clock duty-cycle will be 50%:

(Source code, png, hires.png, pdf)

Clock settings while disabled

To start the clock synchronously you can set them while the Block is disabled. It will start on rising edge of ENABLE and be zeroed on the falling edge.

(Source code, png, hires.png, pdf)