Host Control (HC) Operational Registers
MPC5200B Users Guide, Rev. 1
Freescale Semiconductor 12-21
12.4.5.3 USB HC Rh Status Register—MBAR + 0x1050
This register is divided into two parts. The lower 16 bits of a 32-bit word represents the hub status field; the upper word represents the hub
status change field. Reserved bits should always be written 0.

Table12-20. USB HC Rh Descriptor B Register

msb 012345678 9 101112131415
R PPCM
W
RESET:000000000 0 0 000 0 0
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 lsb
RDR
W
RESET:000000000 0 0 000 0 0
Bits Name Description
0:15 PPCM Port PowerControlMask—each bit indicates whether a port is affected by a global power
control command when PSM is set.
When set, port power state is only affected by per-port power control
(Se t/ Cle arPo rt Power ).
When cleared, port is controlled by the global power switch
(Set/ ClearGlobalPower).
If device is configured to Global Switching Mode (PSM= 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
bit15—Ganged-power mask on Port #15
16:31 DR NDeviceRemovable—each bit is dedicated to a Root Hub port. 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
bit15—Device attached to Port #15

Table12-21. USB HC Rh Status R egister

msb 012345678 9 101112131415
RCRWE Reserved OCIC LPSC
W
RESET:000000000 0 0 000 0 0
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 lsb
RDRWE Reserved OCI LPS
W
RESET:000000000 0 0 000 0 0