ISP1161A1BD,151 STEricsson, ISP1161A1BD,151 Datasheet - Page 63

• Manufacturer Part Number: ISP1161A1BD,151
• Manufacturer: STEricsson

Specifications of ISP1161A1BD,151

• Lead Free Status / RoHS Status: Supplier Unconfirmed

ISP1161A1_4
Product data sheet
Table 35.
Bit
8
7 to 5
4
3
HcRhPortStatus[1:2] register: bit description
Symbol
PPS
-
PRS
POCI
Rev. 04 — 29 January 2009
Description
(read) PortPowerStatus: This bit reflects the port power status,
regardless of the type of power switching implemented. This bit is
cleared if an overcurrent condition is detected.
The HCD sets this bit by writing SetPortPower or SetGlobalPower.
The HCD clears this bit by writing ClearPortPower or
ClearGlobalPower. Which power control switches are enabled is
determined by PowerSwitchingMode.
In the global switching mode (PowerSwitchingMode = 0), only
Set/ClearGlobalPower controls this bit. In per-port power switching
(PowerSwitchingMode = 1), if bit PortPowerControlMask[NDP] for the
port is set, only Set/ClearPortPower commands are enabled. If the
mask is not set, only Set/ClearGlobalPower commands are enabled.
When port power is disabled, CurrentConnectStatus,
PortEnableStatus, PortSuspendStatus, and PortResetStatus should
be reset.
0 — port power is off
1 — port power is on
(write) SetPortPower: The HCD writes a logic 1 to set
bit PortPowerStatus. Writing a logic 0 has no effect.
Remark: This bit always reads logic 1 if power switching is not
supported.
reserved
(read) PortResetStatus: When this bit is set by a write to
SetPortReset, port reset signaling is asserted. When reset is
completed, this bit is cleared when PortResetStatusChange is set.
This bit cannot be set if CurrentConnectStatus is cleared.
0 — port reset signal is not active
1 — port reset signal is active
(write) SetPortReset: The HCD sets the port reset signaling by writing
a logic 1 to this bit. Writing a logic 0 has no effect. If
CurrentConnectStatus is cleared, this write does not set
PortResetStatus but instead sets ConnectStatusChange. This informs
the driver that it attempted to reset a disconnected port.
(read) PortOverCurrentIndicator: This bit is valid only when the Root
Hub is configured in such a way that overcurrent conditions are
reported on a per-port basis. If per-port overcurrent reporting is not
supported, this bit is set to logic 0. If cleared, all power operations are
normal for this port. If set, an overcurrent condition exists on this port.
This bit always reflects the overcurrent input signal.
0 — no overcurrent condition
1 — overcurrent condition detected
(write) ClearSuspendStatus: The HCD writes a logic 1 to initiate a
resume. Writing a logic 0 has no effect. A resume is initiated only if
PortSuspendStatus is set.
USB single-chip host and device controller
…continued
ISP1161A1
© ST-NXP Wireless 2009. All rights reserved.
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