isp1161bm NXP Semiconductors, isp1161bm Datasheet - Page 65

• Manufacturer Part Number: isp1161bm
• Description: Isp1161 Full-speed Universal Serial Bus Single-chip Host And Device Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 09567
Product data
Table 35:
Bit
2
1
0
HcRhPortStatus[1:2] register: bit description
Symbol
PSS
PES
CCS
Rev. 02 — 13 December 2002
Description
(read) PortSuspendStatus: This bit indicates whether the port is
suspended or in the resume sequence. It is set by a
SetSuspendState write and cleared when
PortSuspendStatusChange is set at the end of the resume
interval. This bit cannot be set if CurrentConnectStatus is cleared.
This bit is also cleared when PortResetStatusChange is set at the
end of the port reset or when the HC is placed in the
USBRESUME state. If an upstream resume is in progress, it
should propagate to the HC.
0 — port is not suspended
1 — port is suspended
(write) SetPortSuspend: The HCD sets the PortSuspendStatus
bit by writing logic 1 to this bit. Writing logic 0 has no effect. If
CurrentConnectStatus is cleared, this write does not set
PortSuspendStatus; instead it sets ConnectStatusChange. This
informs the driver that it attempted to suspend a disconnected
port.
(read) PortEnableStatus: This bit indicates whether the port is
enabled or disabled. The Root Hub may clear this bit when an
overcurrent condition, disconnect event, switched-off power, or
operational bus error such as babble is detected. This change also
causes PortEnabledStatusChange to be set. The HCD sets this bit
by writing SetPortEnable and clears it by writing ClearPortEnable.
This bit cannot be set when CurrentConnectStatus is cleared. This
bit is also set, if it is not already, at the completion of a port reset
when ResetStatusChange is set or port suspend when
SuspendStatusChange is set.
0 — port is disabled
1 — port is enabled
(write) SetPortEnable: The HCD sets PortEnableStatus by writing
logic 1. Writing logic 0 has no effect. If CurrentConnectStatus is
cleared, this write does not set PortEnableStatus, but instead sets
ConnectStatusChange. This informs the driver that it attempted to
enable a disconnected port.
(read) CurrentConnectStatus: This bit reflects the current state
of the downstream port.
0 — no device connected
1 — device connected
(write) ClearPortEnable: The HCD writes logic 1 to this bit to clear
the PortEnableStatus bit. Writing logic 0 has no effect.
CurrentConnectStatus is not affected by any write.
Remark: This bit always reads logic 1 when the attached device is
non removable (DeviceRemoveable[NDP]).
Full-speed USB single-chip host and device controller
© Koninklijke Philips Electronics N.V. 2002. All rights reserved.
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