Signal Timing (WaveDrom)

{ "signal": [
  { "name": "clk",  "wave": "p.....|..." },
  { "name": "Data", "wave": "x.345x|=.x", "data": ["A", "B", "C", "D"] },
  { "name": "Req",  "wave": "0.1..0|1.0" }
]}