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Public Version
High-Speed USB Host Subsystem
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Bits
Field Name
Description
Type
Reset
18
PSSC
Port 2 suspend status changed. This bit is set when the
RW
0
Port 2 port suspend status has changed.
Write 0x0: No effect.
Write 0x1: Clears this bit.
17
PESC
Port 2 enable status change. This bit is set when the Port
RW
0
2 port enable status has changed.
Write 0x0: No effect.
Write 0x1: Clears this bit.
16
CSC
Port 2 connect status change. This bit is set when the
RW
0
Port 2 port current connect status has changed due to a
connect or disconnect event.
If current connect status is 0 when a set port reset, set
port enable, or set port suspend write occurs, this bit is
set.
Write 0x0: No effect.
Write 0x1: Clears this bit.
Note: If the DR bit
[1] is set, this bit
is set only after a root hub reset to inform the system that
the device is attached.
15:10
RESERVED
Reserved
R
0x00
9
LSDA_CPP
Port 2 low-speed device attached/clear port power. This
RW
0
bit is valid only when port 2 current connect status is 1.
Read 0x0: A full-speed device is attached to port 2.
Read 0x1: A low-speed device is attached to port 2.
Write 0x0: No effect.
Write 0x1: Clears the port 2 port power status.
8
PPS_SPP
Port 2 port power status/set port power.
RW
0
Read 0x0: Port 2 power is enabled.
Read 0x1: Port 2 power is not enabled.
Write 0x0: No effect.
Write 0x1: Sets the port 2 port power status bit.
7:5
RESERVED
Reserved
R
0x0
4
PRS_SPR
Port 2 port reset status/set port reset.
RW
0
Read 0x0: USB reset is not being sent to port 2.
Read 0x1: Port 2 is signaling the USB reset.
Write 0x0: No effect.
Write 0x1: Sets the port 2 port reset status bit and causes
the USB host controller to begin signaling USB reset to
port 2.
3
RESERVED
Reserved
RW
0
2
PSS_SPS
Port 2 port suspend status/set port suspend. This bit is
RW
0
cleared automatically at the end of the USB resume
sequence and also at the end of the USB reset
sequence.
Write 0x0: No effect.
Read 0x0: Port 2 is not in the USB suspend state.
Read 0x1: Port 2 is in the USB suspend state or is in the
resume sequence.
Write 0x1: If port 2 current connect status is 1, sets the
port 2 port suspend status bit and places port 2 in USB
suspend state. If current connect status is 0, sets instead
connect status change to inform the USB host controller
driver of an attempt to suspend a disconnected port.
1
PES_SPE
Port 2 port enable status/set port enable. This bit is
RW
0
automatically set at completion of port 2 USB reset if it
was not already set before the USB reset completed, and
is automatically set at the end of a USB suspend if the
port was not enabled when the USB resume completed.
Read 0x0: Port 2 is not enabled.
Read 0x1: Port 2 is enabled.
Write 0x0: No effect.
Write 0x1: When port 2 current connect status is 1 sets
the port 2 port enable status bit. When port 2 current
status is 0 has no effect.
3342
High-Speed USB Host Subsystem and High-Speed USB OTG Controller
SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated