<analog.digitalstimulus />

<analog.digitalstimulus /> declares binary traffic for an external <analog.transientsimulation /> using spiceEngine="pcb_spice". It targets a physical pin with an IBIS model and an explicit enabled-output state. Rendering records the stimulus in Circuit JSON; an external runner executes it.

Example

Import analog from "tscircuit". Place these declarations alongside the modeled chips in the same board/subcircuit. This fragment assumes U1.DQ already has a physical pad and a vendor IBIS model binding; it is not a standalone circuit.

import { analog } from "tscircuit"

export const Traffic = () => (
  <>
    <analog.transientsimulation
      name="DDR"
      duration="160ns"
      timePerStep="10ps"
      spiceEngine="pcb_spice"
      ibisPinStates={{
        ".U1 > .DQ": { isOutput: true, isOutputEnabled: true },
      }}
    />
    <analog.digitalstimulus
      name="DQ traffic"
      simulationRef=".DDR"
      sourcePinRef=".U1 > .DQ"
      bitDuration="2.5ns"
      startTime="0ns"
      initialState={0}
      transmittedData={{
        transmissionType: "bits",
        bits: "0110",
        repeat: true,
      }}
    />
  </>
)

Properties

Property	Description
`name`	Required stimulus name, unique within the experiment.
`simulationRef`	Required selector for one external transient experiment in the same subcircuit.
`sourcePinRef`	Required selector for one physical source pin in the same subcircuit.
`bitDuration`	Required positive duration per bit. Numeric times are milliseconds.
`startTime`	Required nonnegative start time, before the experiment ends.
`initialState`	Required `0` or `1`, before optional inversion.
`inverted`	Invert the traffic; defaults to `false`.
`transmittedData`	Required `{ transmissionType: "bits", bits, repeat }` object. `bits` is a nonempty binary string or array of `0`/`1` values (at most 65,536 bits). `repeat` is a required boolean.

A pin can have only one stimulus per experiment. Its ibisPinStates entry must set both isOutput and isOutputEnabled to true. No traffic defaults are inferred. Add an <analog.eyediagram /> to measure a receiver's waveform.

Example​

Properties​

Example

Properties