ISP1160
Embedded USB Host Controller
Philips Semiconductors
Bit
15
DRWE
0
14
13
12
11
10
9
8
Symbol
Reset
Access
Bit
reserved
0
R
6
0
R
5
0
R
4
0
R
3
0
R
2
0
R
0
R
R/W
7
1
0
Symbol
Reset
Access
reserved
OCI
0
LPS
0
0
0
0
0
0
0
R
R
R
R
R
R
R
R/W
Table 33: HcRhStatus register: bit description
Bit
Symbol
Description
31
CRWE
On write—ClearRemoteWakeupEnable: Writing a logic 1 clears
DeviceRemoveWakeupEnable. Writing a logic 0 has no effect.
30 to 18
17
-
reserved
OCIC
OverCurrentIndicatorChange: This bit is set by hardware when a
change has occurred to the OCI field of this register. The HCD
clears this bit by writing a logic 1. Writing a logic 0 has no effect.
16
LPSC
On read—LocalPowerStatusChange: The Root Hub does not
support the local power status feature. Therefore, this bit is always
read as logic 0.
On write—SetGlobalPower: In global power mode
(PowerSwitchingMode = 0), this bit is written to logic 1 to turn on
power to all ports (clear PortPowerStatus). In per-port power
mode, it sets PortPowerStatus only on ports whose bit
PortPowerControlMask is not set. Writing a logic 0 has no effect.
15
DRWE
On read—DeviceRemoteWakeupEnable: This bit enables the bit
ConnectStatusChange as a resume event, causing a state
transition USBSuspend to USBResume and setting the
ResumeDetected interrupt.
0 — ConnectStatusChange is not a remote wake-up event
1 — ConnectStatusChange is a remote wake-up event
On write—SetRemoteWakeupEnable: Writing a logic 1 sets
DeviceRemoveWakeupEnable. Writing a logic 0 has no effect.
14 to 2
1
-
reserved
OCI
OverCurrentIndicator: This bit reports overcurrent conditions
when global reporting is implemented. When set, an overcurrent
condition exists. When clear, all power operations are normal. If
per-port overcurrent protection is implemented this bit is always
logic 0.
0
LPS
On read—LocalPowerStatus: The Root Hub does not support the
local power status feature. Therefore, this bit is always read as
logic 0.
On write—ClearGlobalPower: In global power mode
(PowerSwitchingMode = 0), this bit is written to logic 1 to turn off
power to all ports (clear PortPowerStatus). In per-port power
mode, it clears PortPowerStatus only on ports whose
bit PortPowerControlMask is not set. Writing a logic 0 has no
effect.
9397 750 11371
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
Product data
Rev. 04 — 04 July 2003
52 of 88
NXP [ NXP ]
