5.2.2 GDU OPERATION MODES

  • GDU OFF mode: VG, VCP and Gate Control are deactivated.
  • GDU Standby mode: VG and VCP are active as long as VS undervoltage has not been detected.
  • GDU Normal mode: VG, VCP and Gate Control are active. Also, if selected, Back-EMF is active.

    The state diagram is illustrated below.
Figure 5-6. GDU Operating Modes
  • a: Power-on Reset
  • b: Device in Power Off ( VVS < VVS_PowerOFF )
  • c: VVG < VVGS_UV_Set ‖ ( VVCP -VVDH) < VVGS_UV_Set, when VGS undervoltage monitoring is active.
  • d: No VG and VCP undervoltage detected
  • e: VVS < VVS_UV_Set
  • f: No VS undervoltage detected
  • g: Any GDU related failure registered (overcurrent with ILIMSDEN=1 and/or short-circuit event with SCSDEN=1 and/or overtemperature shutdown, etc.)
  • h: GDUOPM = GDU OFF mode
  • i: GDUOPM = GDU Standby mode
  • j: GDUOPM = GDU Normal mode and device is in Normal mode
  • k: DOPM = Normal mode
  • o: Device is in Deep Sleep mode
  • p: VDH overvoltage & VDHOVSD = 1
Note:
  • VG and VCP are enabled at GDU transition from Off to Standby (default). The DSR1.GDUS flag is available if GDUOPM = Normal.
  • CSA1/2/3 is available when DOPMCR.DOPM = Normal and CSCR.CSA1/2/3EN bits are activated.
  • GDU = Normal mode can be written in any state of DOPM, but it will not be active if DOPM is switched in Normal mode while GDU = Normal. To activate the GDU, it is necessary to manually switch the GDU back into Standby and then into Normal.