Cirrus Logic EP93xx - Manual (Page 470)

11-30 DS785UM1
Copyright 2007 Cirrus Logic
Universal Serial Bus Host Controller
EP93xx User’s Guide
1
1
1
1
11
Default:
0x0000_0000
Definition:
Describes the root hub.
Bit Descriptions
RSVD: Reserved. Unknown During Read.
DR: DeviceRemovable. Each bit is dedicated to a port of the
Root Hub. When cleared, the attached device is
removable. When set, the attached device is not
removable.
bit 0: Reserved
bit 1: Device attached to Port #1
bit 2: Device attached to Port #2
bit 3: Device attached to Port #3
PPCM: PortPowerControlMask: Each bit indicates if a port is
affected by a global power control command when
PowerSwitchingMode is set. When set, the port’s power
state is only affected by per-port power control
(Set/ClearPortPower). When cleared, the port is controlled
by the global power switch (Set/ClearGlobalPower). If the
device is configured to global switching mode
(PowerSwitchingMode=0), this field is not valid.
bit 0: Reserved
bit 1: Ganged-power mask on Port #1
bit 2: Ganged-power mask on Port #2
bit 3: Ganged-power mask on Port #3
HcRhStatus
Address:
0x8002_0050
Default:
0x0000_0000
Definition:
Root hub status.
Bit Descriptions:
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
CRWE RSVD CCIC LPSC
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
DRWE RSVD OCI LPS