isp1161bm NXP Semiconductors, isp1161bm Datasheet - Page 61
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isp1161bm
Manufacturer Part Number
isp1161bm
Description
Isp1161 Full-speed Universal Serial Bus Single-chip Host And Device Controller
Manufacturer
NXP Semiconductors
Datasheet
1.ISP1161BM.pdf
(137 pages)
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Product data
Bit
Symbol
Reset
Access
7
0
10.3.4 HcRhPortStatus[1:2] register (R/W [1]:15H/95H, [2]: 16H/96H)
Table 33:
The HcRhPortStatus[1:2] register is used to control and report port events on a
per-port basis. NumberDownstreamPorts represents the number of HcRhPortStatus
registers that are implemented in hardware. The lower word is used to reflect the port
status, whereas the upper word reflects the status change bits. Some status bits are
Bit
31
30 to 18
17
16
15
14 to 2
1
0
6
0
HcRhStatus register: bit description
Symbol
CRWE
-
OCIC
LPSC
DRWE
-
OCI
LPS
5
0
Rev. 02 — 13 December 2002
reserved
R
Description
On write—ClearRemoteWakeupEnable: Writing logic 1 clears
DeviceRemoveWakeupEnable. Writing logic 0 has no effect.
reserved
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 logic 1. Writing logic 0 has no effect.
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 logic 0 has no effect.
On read—DeviceRemoteWakeupEnable: This bit enables
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 logic 1 sets
DeviceRemoveWakeupEnable. Writing logic 0 has no effect.
reserved
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.
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
PortPowerControlMask bit is not set. Writing logic 0 has no effect.
Full-speed USB single-chip host and device controller
4
0
3
0
2
0
© Koninklijke Philips Electronics N.V. 2002. All rights reserved.
OCI
R
1
0
ISP1161
LPS
R/W
61 of 137
0
0
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