Digi NS9750 - Manual (Page 782)

U S B h o s t b l o c k r e g i s t e r s
7 5 8 N S 9 7 5 0 H a r d w a r e R e f e r e n c e
D00 R/W LPS 0b LocalPowerStatus (read)
Not supported; always read as 0.
ClearGlobalPower (write)
In global power mode (PowerSwitchingMode=0), this bit
is always written to 1 to turn off power to all ports (clear
PowerPortStatus).
In per-port power mode, this bit clears PortPowerStatus
only on ports whose PortPowerControlMask bit is not set.
Writing 0 to this bit has no effect.
Bits Access Mnemonic Reset Description
Table 443: HcRhStatus register