{
  signal: [
  {name: 'clock',        wave: 'pP|..',phase:0.5},
  {name: 'okToWrite',    wave: '01...',},
  {name: 'writeReq',     wave: '0.10.',node: '...a.'},
  {name: 'readyToWrite', wave: '0....'},
],
 edge: ['a See note']
  ,config: { hscale: 2}
  ,head:   {text:'Illegal write sequence, deassertion of writeReq before readyToWrite'}
  ,foot:   {text:'Note. Once started, commit until readyToWrite is asserted, '}
}