Cirrus Logic EP93xx User Manual
Page 472
11-32
DS785UM1
Copyright 2007 Cirrus Logic
Universal Serial Bus Host Controller
EP93xx User’s Guide
1
1
1
1
11
HcRhPortStatusx
Address:
HcRhPortStatus1 - 0x8002_0054,
HcRhPortStatus2 - 0x8002_0058,
HcRhPortStatus3 - 0x8002_005C
Default:
0x0000_0100
Definition:
Control/status for root hub port 1, 2, and 3 respectively
Bit Descriptions:
CCS:
(READ) CurrentConnectStatus: This bit reflects the current
state of the downstream port.
0 = no device connected
1 = device connected
(WRITE) ClearPortEnable: The HCD writes a “1” to this bit
to clear the PortEnableStatus bit. Writing a “0” has no
effect. The CurrentConnectStatus is not affected by any
write.
Note: This bit is always read “1” when the attached device is nonremovable
(DeviceRemoveable.NDP).
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
RSVD
PRSC
OCIC
PSSC
PESC
CSC
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RSVD
LSDA
PPS
RSVD
PRS
POCI
PSS
PES
CCS